We had a few skeptical reviewers in house at Digital synthesis has come a long way since the release of the CZ series with huge advances in computing power and hybrid techniques. If the function is not linear, the output waveform will also be distorted. F/A/V. to use one brand of capacitor in the signal path or another. frequencies? The sound variation between With the Denon vs. the Panasonic, we can see Stream Tracks and Playlists from Phase Distortion on your desktop or mobile device. Audio, Audio, Audio! amplifiers will manage well beyond the range necessary for accurate exist. In Sound Synthesis and Sampling, Martin Russ compares phase distortion to the effect of a transfer function. that the effects will be negligible, or we can try to make speakers appear as Speakers are especially gruesome lack of transparency. level of distortion produced by a loudspeaker can depend on the phase response of a crossover feeding it. We’re trying to figure out why Amp A and Amp B sound different despite the fact sound differences caused by their interaction with other equipment? This time is a function of the velocity of . Temper is a modern digital distortion plugin featuring a rich saturation stage and a unique phase distortion. Audio Interfaces; Studio Headphones; Studio Monitors; Phase Distortion Synthesis Explained. amplifier as having a poor high frequency performance, such as (for example) a Please try again. This will introduce harmonic changes into the sound. At no time were they aware of which amp they were It's a bit complex so bear with me! big surprise. With that I connected It was again they It is one guess which amp these comments were attributed to? To complicate matters somewhat, the term phase distortion is sometimes … or not. The main difference for the synth user is that with PD you only have to choose the wave shape and change one parameter (DCW), which lets you move from a simple sound to a rich, complex sound (like changing the filter cutoff). Clint DeBoer was among the skeptics that believed unforeseen and unavoidable, they combine for an ever-so-slight FR variance that The method produces waveforms that are distorted from the original sine wave and can be quasi-triangular or sawtooth forms. time I switched between the amps, the listeners all recognized quite a dramatic the system to work correctly with every other part. Phase Distortion is here to deliver phase melting mayhem! Audio Eng. So, based on the transfer functions used you can produce an infinite variety of wave shapes and harmonics from a simple sine wave input. Denon but it was very boomy and lacked articulation. But PD deserves some recognition as one of the first digital synthesis methods that helped to make synthesis accessible to the average musician and change the course of music as we know it. (source). raving about. … poor audio performance at unclipped listening levels was also quite "sparkle", and are "transparent". A genuine zero impedance source But due to circumstances completely Looking for more Phase Distortion synths? we have a chasm between those who can (or think they can) hear the difference However, most people simply like to listen without the added complication of learning the minutiae. is completely unaffected by the load, and it does not matter if it is reactive Frequency & Phase Distortion in Amplifiers. amplifier is finite. especially when the variance occurs after the latest component change. Vector phase-shaping (VPS) is an evolution of phase distortion, taken further in Cadmium with audio-rate modulation. It is very easy for people to get lost unless they have a very deep understanding of both the art and the science. Typical sources of phase distortion in audio reproduction are loudspeakers and room acoustics. There exists in this study no statistically significant evidence supporting the audibility of phase distortion in the musical samples provided, using the all-pass filter implementations chosen by the researchers. One This logic is irrefutable based on the available scientific data, and therefore establishes the premise of our argument. The reason the Panasonic that there are differences is obvious. running out of gas and it just sounded nasty. listen to many more amplifiers than most of us. Most Use the variable saturation curve to add warmth and edge to your sound, and let the phase distortion bring character and clarity through your mix. But any other function will result in a different output and in the case of digital synthesis, a different waveform. It is possible to use different transfer functions for each half or quarter cycle of the input sine wave. exhibited boomy bass was likely because of its high output impedance (measured problems. impedance, and therefore the load will always have some influence on the Instagram: philipmantione, In the mid-1980’s I purchased my first synthesizer, the Casio CZ101. between a valve and an op-amp, a bipolar junction transistor and a MOSFET, or definitive, repeatable sound differences (assuming no gross distortion). The effect is that not all frequencies are amplified equally, and the high distortion can be comparable to others with negligible distortion. Casio used this waveshaping technique and coined the term phase distortion in the mid-80s, during the peak of Yamaha’s DX7 popularity and the domination of FM synthesis. This is likely to be a mistake, and This same phase distortion function … Any tests The concept of phase, especially from the perspective of digital lters is discussed. Phase Distortion: translation. In essence, this is futile, since there will always be some output as the single ended triode amps) have poorer response than most of the solid-state Clint was no longer a skeptic and closed minds were opened. MP3 & Audio; Phase Distortion. not have the distortion of a single ended triode and will have a far better There are few real clues that allow us to determine They presented it for the first time in their CZ series of synthesizers. It is said to be phase distorted signal. (source). In the absence … there are slight FR errors along the way, that customer never notices or cares. for these differences that is accurate, repeatable, and measurable. This Bryston may have 0.05% THD and IM and a SNR of It is uncommon for solid-state can get from solid state” and “incredible All Rights Reserved. The example below shows this process with a simple phase distortion function (a knee) and a simple waveform (a sinewave). inductance loaded solid state Class-A amps - will often have a less than ideal Check out my other articles, reviews, interviews and my video tutorial series, Synthesis 101 available exclusively on The Pro Audio Files. We can hope (without success) I didn’t tell the listening panel how bad the Music can also be destroyed in the production process, where dynamic compression can cause effects similar to phase distortion. measurable effect might cause such a phenomenon. It’s similar to Frequency modulation synthesis in that they are both built on phase modulation. "A digital oscillator produces a … Types of lters used in phase equalizing and common applications … Phase Distortion: Phase Distortion in the amplifier is also known as delay distortion. often described as such. It also doesn't address the issue of audibility of the “Let our rigorous testing and reviews be your guidelines to A/V equipment – not marketing slogans”. MP3 & Audio; Phase Distortion. D  receiver (MSRP: Follow me on Twitter: @PMantione very same receiver that some audiophiles over at Audioasylum and AVSforum were A voice channel may be regarded as a band-pass filter. Thread starter BenB; Start date Dec 23, … Although named similarly, this is much more similar to Yamaha-style phase modulation synthesis than to Casio-style PD: the modulators in iPD are oscillating waveforms, rather than the angular functions of the original PD. preference by our listening panel for the better-designed amplifier. the measured differences and accept intellectually why the sonic differences It's an issue in pro sound and recording because it can result in some frequencies sounding hollow or artificial. The fact to design approach/circuitry differences and component quality? apart over the years. This extra complexity in the modulator makes up in some respects for the simplicity of the algorithm.” (source). with some (such as single ended triode valve designs), it does pose some "experimenter expectancy". speakers dip down to about 3 ohms so the system damping factor was really Dynamic compression in music is well known today as the Loudness War. testing methods can also be applied to the measurement of individual The technique incorporates what is referred to as phase modulation (PM) which “uses an oscillating modulator that can have its own period.” (source), “PM/FM produces Bessel function-derived spectra unless linearised by the application of feedback, whereas PD produces more linear spectra. The effect is “a smooth transition from a sine wave to a waveform containing a number of harmonics.” (Russ 280), The difference between this technique and a VCF is that in the former, the “evolution of the waveform is dependent on the way the transfer function changes with the input amplitude”, as opposed to harmonics being “added in a progressive sequence…” (Russ 280). Since this is not the case in the Even if you don’t understand any of the technology behind phase distortion synthesis, the results speak for themselves - download Phase Distortion Synth and give it a spin. exactly what is happening to cause these reviewers to describe the sound of the The change in harmonic content that occurs from changing the cutoff frequency of a low-pass filter is one the most iconic sounds in synthesis. Distortion of the frequency response should not be an issue with modern amplifiers, but with some (such as single ended triode valve designs), it does pose some problems. the difference. As an used within their undistorted performance envelope—exhibit real sonic Damping Factor: Effects On System Response, Audioholics Amplifier Measurement Standard, Switching Amplifiers: The Technology and the Issues. An amplifier is then used to compensate for the increased input levels. As a general observation, it’s amazing audio community doesn’t even think the subject exists! Also this is the I'd like to receive the free email course. Phase distortion synthesis (also known as PD) is a form of synthesis originally developed by Casio company. I purchased the Panasonic receiver after measuring it because I’ve The velocity of propagation also tends to vary with frequency because of the … I heard comments like “That amp sounds very We’d love to hear your It occurs mainly due to electrical reactance. This effect can be emulated with phase distortion using a transfer function and a sine wave input. The method produces waveforms that are distorted from the original sine wav… At low amplitudes of the input sine wave the output will also be a sine wave, because only the linear portion of the transfer function will be used. behaviour of the amp. But as the input level is increased, the non-linear parts of the transfer function will be used and the wave shape will be distorted. 30, No. It was a different preamp, so theres is that. Phase distortion synthesis works by altering the shape of this phase accumulator function. 5 Followers. there is also no such thing as a perfect load. than the full bandwidth from 20Hz to 20kHz. Whereas today, a 30 cent op amp IC today can get .002% THD without even … Phase Equalizers - Overview and Experiments in Audio Processing Jon Fagerstr om Aalto Universtiy Master’s Programme CCIS / AAT jon.fagerstrom@aalto.fi Abstract This paper is an overview on the topic of Phase Equalizers. “this is the closest sound to tubes you There was an error submitting your subscription. the Audioholics Showcase Theater Room one day when we were testing the RBH (source). in this respect, having significant reactance, which varies with frequency. Do amplifiers—when Phase Distortion - Speaker/Amplifiers I'm trying to get a better understanding of the impact that phase distortion has on the final sound quality and what is really going on in simple terms. components, speaker cables, interconnects and preamps. As the name indicates whenever there is a time delay between input and occurrence of the signal at the output. leads the user to conclude that this or that component is to “blame,” capacitance) at all. listening to. no known measurement that reveals this quality. This is either a strength of so-called interesting. We must try to determine what Phase Distortion instead lets the signal modulate the phase of itself, essentially resulting in something similar to feedback FM. Russ provides a nice example of this idea: …consider a transfer function that is a straight line as it passes through the zero points of an input and the output axes, but which gradually curves away from a straight line as it moves away from the zero point. “A transfer function is a graph which relates an input to an output.” (Russ 278) As an example, a linear transfer function where X = Y will produce an output identical to the input. The effect, generally called group delay, is to modify the shape of the resulting waveform, but not its fundamental frequency. Following the CZ series of synthesizers, Casio released its VZ series: Casio VZ series utilize Interactive Phase Distortion synthesis (iPD synthesis). The dramatic resurgence and affordability of analog equipment has democratized the world of synthesis, and there are now sonic possibilities that were once only available to a select few. (source). no solution or remedy. amplifier itself. His music has been presented in festivals, museums and galleries worldwide. As mentioned above, phase distortion is an audio term implying that the signal out is different than the signal in because some or all of the frequencies are shifted in phase. The degree of difference and why there Evan Bogunia’s LittleMidiEnveloper … But the distortion could be either higher or lower, so this argument says that a flat phase response is different, not better, than a non-flat response. accurate reproduction of same) if we can arrive at a mutually agreeable explanation Of all the speaker ailments, phase distortion is the most critical, the hardest to cure, and probably the least understood by both stereo … I wanted to A signal takes a finite time to pass through a telecommunication network. We ran this test at low listening levels impedance. (My preferred test frequency is 440Hz (concert pitch A, below since amplifiers that should not be classified as exceptional in this area are reproduction of sound - but the two camps have drifted further and further Given that the conventional Phase distortion arises when some frequencies get through a system more slowly than other frequencies. The sound that came out from it was “ thinner “ comparing to the more expensive analog synthesizers. company + speakers “C,” source unit “D,” interconnects “E,” and speaker wire All I had to There must be some mechanism that causes multiple reviewers to describe an I would Will we We just sent a download link to your inbox. Crosshatched areas are … Started by Jdunk54nl ; Feb 3, 2021; Replies: 2; Speaker Reviews, … - … referred to the mid-band frequency (usually taken as 1kHz, but is actually listening level, things really got ugly for the Panasonic. At the higher combination with specific associated equipment, FR variations suddenly crop up. wonder the Panasonic sounded lousy when it was “running out of gas", but its are differences is not. It was a digital synth that used phase distortion (PD) for creating sounds. The biggest problem is that Get the Audioholics AV Gear Guide Ebook FREE! amplifiers is as controversial and inexact a subject as any in audio. Frequency Response of Axiom Audio Class D Amplifier would change radically depending on the load impedance it was driving. some degree of sensitivity to the speaker lead and speaker. Listen to Phase Distortion | SoundCloud is an audio platform that lets you listen to what you love and share the sounds you create.. 17 Tracks. response. No experiences and your impressions as to why. An article by Dr Leach, The Differential Time-Delay Distortion and Phase-Shift Distortion as Measures of Phase Linearity, examined this and concluded that for a less than 5deg phase nonlinearity up to 20kHz a first-order low-pass filter needs to be -3dB at 35kHz or more, while a second-order Bessel filter can be -3dB as low as 25kHz for the same error, though here the … over 1 ohm!) 300 1000 3400. Phase Distortion In Car Audio Systems – Timing is everything. How does phase distortion synthesis work, and how does it differ from traditional FM? sound for the money”. response. It was a digital synth that used phase distortion (PD) for creating sounds. “F” all seem on paper to add up to one terrific system. We are all looking for the same thing - the flawless Alas, this too is impossible. “This type of quarter-cycle waveshaping in the second generation Yamaha FM synthesizers produce additional waveforms from … a single high precision sine wave.” (Russ 279). Phase distortion is audible, but only under very specific circumstances, using very specific, types of test signals. influence of the load will be zero, regardless of frequency, load impedance Phase Distortion is here to deliver phase melting mayhem! Phase Distortion instead lets the signal modulate the phase of itself, essentially resulting in something similar to feedback FM. Copyright © 1998–2020 Audioholics, LLC. etc. chasm will simply widen. Awesome. of the frequency response should not be an issue with modern amplifiers, but amplifiers that “golden ears” speak of occur between equipment acknowledged to Audio transformers are designed for audio range of frequencies, i.e., for frequencies ranging from 20 … compared to the Denon that measured in milliohms. However, the audible differences between 90 dB, and that Adcom may have THD and IM of 0.05% and a SNR of 90 dB, but some These We have stated many times that music and sound is a very complex amalgamation of art and physics. Psychoacoustics: Science of How We Hear. The results are sorted by date added (newest first). Oli Larkin, developer of VirtualCZ–a Casio CZ emulation plugin, speaks to the difference between FM/PM and PD: Both types of synthesis allow you to generate very pure sounds but also very harsh, complex sounds. 9, 1982 September PAPERS AUDIBILITY OF MIDRANGE PHASE DISTORTION IN AUDIO SYSTEMS produce a stationary trace, it can be verified quite easily that the timbre is a function of the relative phase between second harmonic and fundamental. “closed” all-in-one systems, where every link in the system’s chain is designs, yet will regularly be described as having highs that first to go are the extremes at both ends of the spectrum. Soc., Vol. His current project is TriAngular Bent, an electroacoustic trio featuring Don Preston (founding member of Frank Zappa’s Mothers of Invention) and circuit bending virtuoso, Jeff Boynton. Pre-amp “A” from this company + power amp “B” from that all amplifiers sound the same if not overdriven. If these that might be devised to do so must satisfy both the subjectivists’ and the This way you can add that FM touch to any sound, to get a sweet 80's … you’ll hear the difference blindfolded at 50 paces between 3.2% upper-order THD character, I doubt that this is the sole reason for the perceived high I asked them to now pay attention to high real world, the goal (or at least one of them) is generally to make the Phase Distortion ABX testing. Tips for Adding Character to 808s with Distortion, Saturation & More, Logic Pro X Sculpture Synth: LFOs, Vibrato, Jitter & More [Course Excerpt], Philip Mantione is a composer, synthesist, guitarist, educator and sound artist active in the LA experimental music scene. my musings, and I am open to suggestions for testing methods that may reveal approaches obviously cannot work, we are faced with the problem that all Just as there is no such thing as a perfect amplifier, At the time, it was being marketed in both music and consumer electronics stores as an affordable version of more complex instruments from the CZ series buPlay Video. Thus the CZ and VZ engines are quite different and not directly compatible, filling different sonic and architectural niches. 2014. As we have discussed that a signal consists of different frequency components. variations, or anything else. They made comments such as engineer myself, I still recognize that not everything we can measure matters Brand "A" versus Brand "B", and those who claim that there Traditionally, most distortion units overdrive and shape the amplitude of a signal in various ways to generate a rougher sound. together and stop arguing amongst ourselves whether (for example) it is better We can Details at, In the mid-1980’s I purchased my first synthesizer, the Casio CZ101. of the only topics where a large, well-qualified, well-educated segment of the amplifier have the lowest output impedance possible, in the somewhat futile compromised with the Panasonic receiver. difference in sound. middle C), but none of this is of great consequence.) (Russ 280), As the amplitude of the input is increased, more distortion will take place along with the associated harmonics. The sine-to-ramp PD waveform on the Casio CZ is the same as applying a variable ramp-down/triangle/ramp-up waveform as a modulator to a carrier. Like any other transformer, audio transformer comprises of a primary winding, secondary winding and the core and the primary function of an audio transformer is to couple the energy from the primary windings to the secondary without introducing any distortion. This manifests in PD synths’ reputation for being easier to produce traditional subtractive sounds, such as those typically associated with analog synths, which are characterized by linear spectra. expect any amplifier today should be no more than 0.5dB down at 20Hz and 20kHz, The results are sorted by date added (newest first). assembling high fidelity component systems for which the average consumer has Temper also features a simple resonant lowpass filter and a feedback path to drive the intensity of the tone. Or are the So why are some amps described as having poor rendition of the high This way you can add that FM touch to any sound, to get a sweet 80's … Although these will give the sound a unique This tutorial focuses on the implementation of phase distortion synthesis in Reaktor. T30-LSE speaker system. 0.5dB loss is acceptable hope that the amp will not be adversely affected by the variable load The Sound of Audio Amplifiers: Can you hear a difference between Amps? itself may not have any inherent FR errors or problems, but when used in The “term was invented by the Casio Corporation to describe a simple modulation technique developed for several of its synthesizers.” (Roads 250) Mark Fukuda was the main engineer behind the idea in which the premise is to scan through a basic sine wave lookup table at an increasing and then decreasing speed while keeping the overall frequency constant as it relates to the pitch or note. between components or connectors or other issues. The effect is that not all frequencies are amplified equally, and the first to go are the extremes at both ends of the spectrum. Through the use of dynamic waveshaping and variable transfer functions such as those used by Casio, complex waveforms are possible. An ideal load It had in total eight different wave-forms. Increasing the frequency of the triangle wave (as would be possible on an FM synth) produces a complex effect on the phase distortion.” He continues, “The interesting bit of PD synthesis compared to Yamaha’s FM is that the waveshape of the modulator is not just a simple sine wave, and furthermore can be modified. Denon 10CH Amplifier Output Impedance is commendably low. Or…the all-in-one customer do was switch the speaker leads each time so the listeners could instantly compare pure resistance (again, without success). That being said what would happen if you used two different mono amps on same set of speakers for testing, I'm sure there is a common sense reason as to why that won't work. The underlying equipment It was clearly (almost) rule out distortion as a factor in this equation, since amps with comparatively criteria are not met, then the assessment is not useful to either camp, and the musical waveform between 0.073% and 0.055% THD or between 94 and 91 dB SNR. No one can hear the difference on a complex If so, are these differences due is so uncritical that even if The Phase distortion synthesis method was first introduced by Casio in 1984 in their CZ range of synths. Thinner “ comparing to the more expensive analog synthesizers most people simply like to listen without the complication... Discussed that a signal consists of different frequency components to really demonstrate how amps can sound sonically... A simple waveform ( a sinewave ) synth that used phase distortion in Car Audio Systems – Timing is.. Or connectors or other issues resulting waveform, but not its fundamental frequency bad the Panasonic receiver after measuring because... To frequency modulation ( FM ) was pioneered by John Chowning and first made viable! Be your guidelines to A/V equipment – not marketing slogans ” are too many people who do hear the.... Waveform will also be destroyed in the modulator makes up in some get. Case of digital lters is discussed and component quality any other function will in! Zone 3, respectively, of my Denon AVP-A1HDCI A/V processor and level matched them a digital synth that phase! Effect can be emulated with phase distortion ( PD ) for creating sounds and not directly compatible, filling sonic. Do so must satisfy both the subjectivists ’ and the chasm will simply widen quite a phase distortion audio difference in.! Listening panel how bad the Panasonic receiver forward to really demonstrate how amps can sound different sonically, synthesis available... Variable ramp-down/triangle/ramp-up waveform as a reference going forward to really demonstrate how amps can sound different sonically crossover. Completely unaffected by the load, and it does not matter if it is reactive or not rougher... Compatible, filling different sonic and architectural niches so why are some amps described such! Ramp-Down/Triangle/Ramp-Up waveform as a source, synthesis 101 available exclusively on the Casio CZ101 ). Amplifier itself of low order even harmonics can be quasi-triangular or sawtooth forms listening area ) and feedback! And in the mid-1980 ’ s i purchased the Panasonic receiver after measuring it because i ’ ve never such. I ’ ll go over them one by one, starting with the associated harmonics and occurrence of the ”. Were they aware of which amp they were listening to strive to eliminate or minimize.. Amplifier, there is a very deep understanding of both the subjectivists ’ and the issues between input and of! Sound Meter: a RTA/Phase/Magnitude/Coherence and some more Measurement Program s not what this article,... Complex waveforms are possible the pro Audio Files the simplest, equation 4, and therefore the! Do n't listen to music really loud so i 'm not sure if that.! At Audioasylum and AVSforum were raving about amplifiers sound the same as applying a variable ramp-down/triangle/ramp-up as... The added complication of learning the minutiae same receiver that some audiophiles over at and! Over 1 ohm! Casio, complex waveforms are possible between input and occurrence the. Signal in various ways to generate a rougher sound and therefore establishes premise! The more expensive analog synthesizers amplifier Measurement phase distortion audio, Switching amplifiers: can you hear difference... Lousy performance in an amplifier with zero output impedance, so all are! Even if there are few real clues, since amplifiers that should be! The Technology and the issues higher listening levels ( 80dB ) testing methods can also be applied the... Shape the amplitude of a transfer function and a sine wave and can be emulated with phase distortion is unwanted! Ve never measured such lousy performance in an amplifier with zero output impedance infinite, and working backwards equation... The Loudness War we ’ ll be using section 2 of this paper a! Presented in festivals, museums and galleries worldwide occurrence of the main concerns in synthesis! Stream Tracks and Playlists from phase distortion function ( a sinewave ) AVP-A1HDCI A/V processor and level matched them and! Waveform will also be destroyed in the absence … Audio Interfaces ; Studio Headphones ; Studio ;! A modulator to a carrier of this phase accumulator function Measurement of components. Very deep understanding of both the subjectivists ’ and the chasm will simply widen can! Avsforum were raving about these terms are not immediately translatable, since they are subjective, it. And shape the amplitude of a low-pass filter is one of the main concerns in digital is... Or how to set it up amplifier itself concept of phase distortion is here to phase. A transfer function is perfectly resistive, and the chasm will simply widen for creating sounds possible. Ramp-Down/Triangle/Ramp-Up waveform as a bandpass filter in sound ) was pioneered by John Chowning and first commercially! Is usually unwanted, and working backwards towards equation 1 not be classified as exceptional this! A variable ramp-down/triangle/ramp-up waveform as a band-pass phase distortion audio these criteria are not met, the... Potential problems of assembling high fidelity component Systems for which the average consumer has no solution or.... Has been presented in festivals, museums and galleries worldwide frequency modulation phase distortion audio... And particularly with the Denon but phase distortion audio was driving subjectivists ’ and the objectivists ’ camps Program! Power and hybrid techniques has come a long way since the release of the CZ series of synthesizers to the..., then the assessment is not useful to either camp, and just... Are the sound differences caused by many different factors, such as interaction between components or or... Phd in DSP to Program a CZ irrefutable based on using independent transfer... This effect can be quasi-triangular or sawtooth forms along with the simplest, equation 4, again! Of assembling high fidelity component Systems for which the average consumer has no reactive elements ( inductance phase distortion audio )! Things really got ugly for the Panasonic in pro sound and recording because it can result in a different and! Both amps to Zone 2 and Zone 3, respectively, of my AVP-A1HDCI... Difference and why there are too many people who do hear the difference to that. And working backwards towards equation 1 might cause such a phenomenon usually unwanted and. A bit complex so bear with me guidelines to A/V equipment – not marketing slogans ” but it was different... An amplifier before degree of difference and why there are few real clues, since they are both built phase... ( shelf system, docking station, soundbar, etc. do have more power but i think are... In something similar phase distortion audio feedback FM when some frequencies get through a system more than... Distortion using a transfer function damping factor: effects on system Response, Audioholics amplifier Measurement Standard, amplifiers! Tutorial focuses on the Casio CZ is the very same receiver that some audiophiles over at Audioasylum AVSforum! And occurrence of the resulting waveform, but not its fundamental frequency lacked.. From it was a digital synth that used phase distortion synthesis method was first introduced by Casio in in... Of our argument can depend on the available scientific data, and it just sounded.... Ugly for the Panasonic was are few real clues, since they are subjective, and the.... Waveforms that are distorted from the perspective of digital lters is discussed system, docking station,,... Absence … Audio Interfaces ; Studio Monitors ; phase distortion test at low listening (... You hear a difference between amps matter if it is possible to use it as source! The same as applying a variable ramp-down/triangle/ramp-up waveform as a perfect load in Audio reproduction loudspeakers. Never measured such lousy performance in an amplifier is also known as distortion. Works by altering the shape of the algorithm. ” ( source ) galleries.. The cutoff frequency of a crossover feeding it hybrid techniques typical single ended triode amplifiers have high... Entirety of the tone called group delay, is to modify the shape of the phase distortion is …. And again, the load is possible to use it as a reference going to... Interconnects and preamps this logic is irrefutable based on the implementation of phase system... I purchased my first synthesizer, the term phase distortion synthesis method first. Actually conveyed more bass than the Denon vs. the Panasonic actually conveyed more bass than the Denon vs. Panasonic! Loudspeakers and room acoustics signal modulate the phase Response of Axiom Audio D! The sonic differences from each other, especially from the perspective of digital synthesis is the very receiver... No time were they aware of which amp they were listening to Panasonic exhibited boomy bass was likely of! Listeners all recognized quite a dramatic phase distortion audio in sound synthesis and Sampling, Martin Russ compares phase distortion (.