Tag Archive | compression

Tape Hiss, Compression, and the Stubborn Materiality of Sonic Diaspora

In an article for Pitchfork, music critic Adam Ward reminisces about digital music files that sound as if they’re “being played through a payphone,” and calls the extreme compression of the low-quality MP3 “this generation’s vinyl crackle or skipping CD.” The crackles, hisses, and compression that characterize such sound files are what I term “encoded materiality.”  Focusing on the encoded materiality of the digital helps us to reconfigure our approach to sonic media, understanding how the compression of early MP3s and tape hiss remind us not only of lost fidelity, but also of the richness of exchange. These warm and stubborn sonic impurities, having been encoded in our digital listening formats and thus achieving repeatability and variability, act as persistent reminders that we can think diaspora beyond melancholy and authenticity, sidestepping the questions of purity and loss that so often characterize dialogues in the field of diaspora studies.

In Mechanisms, his work on electronic textuality, Matthew Kirschenbaum proposes a “material matrix governing writing and inscription in all forms” composed of four elements: “erasure, variability, repeatability, and survivability” (xiii). The defects of sonic technology that become encoded in digital files are one such type of inscription. Tape hiss and other recording accidents–such as Casey Kasem ruining your attempt to tape record the first Western song you fell in love with after leaving Hong Kong by fading the outro and butting in with his banter–achieve repetition and survival during the digital encoding process, becoming a welcome reminder of time and place. Such materiality helps us to better understand the politics of diaspora. It clues us in to how the elements of textual encoding (erasure, variability, repeatability, and survivability) become embedded within diaspora’s complex logic.

Image by DraconianRain @Flickr CC BY-NC.

Image by DraconianRain @Flickr CC BY-NC.

To think through these complex moments of exchange, let me offer a story about my experience with tape hiss. I grew up listening to music touched by this particular sonic grain: a ground level of noise upon which my sonic experiences were built. After I received my first iPod in 2005, I connected a tape player to the input of my computer, recorded a stack of tapes, and then manually split them into MP3s—pseudo-piracy committed in earnest. A few weeks ago, I dug up these same files and put them on my phone, once again returning the buried albums to their former glory on a constant rotation playlist. I keep returning to these particular files, rather than finding the now easily available digital versions, because I admire the survivability of their materiality. The materiality of these tracks allowed me to trace the complexity of my own history—the tape hiss is just as much a part of this history as the songs themselves.

After first moving to Canada from Hong Kong, my family and I established ourselves by unswervingly performing the same routine each weekend. We would have late lunch at our favorite dim sum restaurant, drive around for a bit, and then relax at home; there wasn’t much to do in the ex-urbs of Toronto. On those drives, we listened to selections from a stack of cassette tapes in the glovebox of our old Pontiac Bonneville. Sally Yeh’s 1987 album Blessing was on constant rotation and received its fair share of wear. This was one of the tapes I recorded to my computer, destined for digitization.

Because I hit the record button a few seconds early, my MP3 of Sally Yeh’s Blessing begins with a few seconds of silence. It’s enough to trick me into thinking that the song isn’t playing. In a quiet enough spot, I can hear that it’s actually tape hiss. No matter where I am, on the road or in the shower, my mind fills in the blank with the thick ker-chunk of the cassette entering that Pontiac stereo right before that familiar tape hiss would fill the car, always giving us a few sometimes-needed, sometimes-awkward moments of silence before the music started. The sonic texture of that tape stems from its material nature as plastic and metal. The hiss itself is due to the size of the magnetized particles on the plastic. Because of these sounds, the song tells its own story. It recalls our shared sonic and material experience as I migrate it from device to device.

Before Blessing made its way into our car, it was one of the few cassette tapes that my parents carefully packed into a dozen cardboard boxes and shipped by sea to Canada in the late 1980s. This was in the midst of the countrywide protests in China that led to the events at Tiananmen Square. That insistent ker-chunk of plastic on metal that my brain inserts every time I play the MP3s keeps my experience of the music grounded in this earlier history, too. Strange that a fluffy pop song would remind me of the serious political strife taking place on the doorstep of a Hong Kong nervously awaiting its “handover.” This sonic anchor’s ability to recall to me these snippets of history, both personal, national, and transpacific has been crucial in the development of my own diasporic identity. Listening to this particular recording of Blessing helps me to keep track of my self and my history.


The act of withdrawal that many of us perform in order to interface with our sonic technologies, as Alexander Weheliye shows in his reading of Ralph Ellison’s Invisible Man in Phonographies, can play a powerful role in understanding one’s own racial subjectivity. Weheliye focuses on the scene in which the titular narrator-protagonist retreats to a subterranean cave-like space to listen to Louis Armstong’s recorded, disembodied voice in complete solitude. He asserts that the narrator builds his own subjectivity through a recognition of the self by projecting that self onto Louis Armstrong’s “vocal apparatus,” that is, his voice coming through a phonograph (143). “The phonograph’s ability to disconnect the singing voice from its face, or rather to replace it with a technological visage, further heightens its materiality, which impels the protagonist to imbue Armstrong’s voice with a surplus of signification” (Weheliye 145).

More than a black and white photo or a stern historical lecture from the elders, the “heightened materiality” of the digital format, a type of “technological visage” cathects my own diasporic history most forcefully to the sonic anchor of tape hiss because it acts as a “voice without a face” in the same way as the phonographic Armstrong. But despite the privacy of the phonographic listening act in this scenario, Weheliye suggests that

the phonographic listening modality also bears the traces of sociality… since the listening subject is drawn out of him/herself by encountering the technologically mediated sounds of other subjects—we might even go so far as to suggest that the phonograph itself functions as a subject, especially in its interfacings with various humans. (165)

So it is with similar sonic technologies that can encourage the “eschewing [of] the social” such as iPhones, CDs, and, yes, cassette tapes. Like Ellison’s narrator interfacing with the mechanical apparatus that conveys Armstrong’s voice, the insistent “defects” kept on the digital file keep the mechanism of its delivery at the fore, allowing me first to understand that diasporic feeling of dis-ease—and to imagine beyond it.

Sally Yeh's "Blessing." Image used with permission by the author.

Sally Yeh’s “Blessing.” Image used with permission by the author.

What I gain from the digital yet still stubbornly material tape of Blessing is not any overt lyrical or thematic gesture to a diasporic subjectivity on the artist’s part, but rather an induction into what Giorgio Agamben calls, “the idea of an inessential commonality, a solidarity that in no way concerns an essence” (18), or perhaps a community based on “belonging itself” (84). Likewise, Weheliye’s “diasporic citizenship coarticulate[s] the national and transnational instead of playing a zero-sum game with political identification” (369).  If diaspora is defined by the perpetual desire to seek an imagined originary point of true identity that inevitably leads to melancholy, as psychoanalysis maintains, tape hiss and other encoded materialities turn the gaze away from the mists of origin, validating instead the development of diasporic identity in the aftermath of emigration. Of course, loss and melancholy are legitimate psychic aspects of the diasporic experience, as persuasively demonstrated by scholars such as David Eng, Shinhee Han, Anne Anlin Cheng, but they neither define the whole experience nor are they mutually exclusive to it. It is in this way that we can think of diaspora as a community of belonging by becoming.

A consideration of the stubborn ways that materiality is encoded in the digital helps us to think of diaspora as more than psychic fait accompli—it is also a ‘coming community’ characterized by the process of belonging. Kirschenbaum’s matrix provides the right foundation for a study which considers how material inscriptions are related to our diasporic lives. The inscription that defined my diasporic becoming came from the cassette tape that travelled across the ocean in a boat for five weeks, escaped erasure, survived repeated playings, became digital, and lives on now as a hissing reminder of our history of emigration. What else may we find about our own becoming and belonging if we attune our ears to the encoded materialities of sonic diaspora?

Featured image “Decayed Cassette” by darkday @Flickr CC BY.

Chris Chien is a Ph.D. candidate in the Department of English at the University of Southern California working variously in the areas of sound, diaspora and transpacific studies, all with a distinctly queer bent. He completed his M.A. in English Literature at Loyola Marymount University and his Honors B.A. in English Literature and Latin at the University of Toronto. Chris has presented papers on angelic gender fluidity in John Milton’s Paradise Lost and post-colonial affect in the work of Herman Melville and Amitav Ghosh at the Rocky Mountain MLA and South Atlantic MLA conferences respectively. He is currently developing a paper that examines the performativity of diaspora, masculinity, and the capitalist ethos in Eddie Huang’s memoir Fresh Off the Boat and its adaptation as an ABC sitcom.

tape reelREWIND! . . .If you liked this post, you may also dig:

Pushing Play: What Makes the Portable Tape Recorder Interesting?Gus Stadler

SANDRA BLAND: #SayHerName Loud or Not at All — Regina N. Bradley

Listening (Loudly) to Spanish-language Radio — Dolores Inés Casillas

Brasil Ao Vivo!: The Sonic Pleasures of Liveness in Brazilian Popular Culture — Kariann Goldschmitt

The Blue Notes of Sampling

Sound and TechThis is article 2.0  in Sounding Out!‘s April  Forum on “Sound and Technology.” Every Monday this month, you’ll be hearing new insights on this age-old pairing from the likes of Sounding Out! veterano Aaron Trammell along with new voices Andrew Salvati and Owen Marshall.  These fast-forward folks will share their thinking about everything from Auto-tune to techie manifestos. So, turn on your quantizing for Sounding Out! and enjoy today’s supersonic in-depth look at sampling from from SO! Regular Writer Primus Luta.  –JS, Editor-in-Chief

My favorite sample-based composition? No question about it: “Stroke of Death” by Ghostface and produced by The RZA.


Supposedly the story goes, RZA was playing records in the studio when he put on the Harlem Underground Band’s album. It is a go-to album in a sample-based composer collection, because of the open drum breaks. One such break appears in the cover of Bill Wither’s “Ain’t No Sunshine”, notably used by A Tribe Called Quest on “Everything is Fair.”


RZA, a known break beat head, listened as the song approached the open drums, when the unthinkable happened: a scratch in his copy of the record. Suddenly, right before the open drums dropped, the vinyl created its own loop, one that caught RZA’s ear. He recorded it right there and started crafting the beat.

This sample is the only source material for the track. RZA throws a slight turntable backspin in for emphasis, adding to the jarring feel that drives the beat. That backspin provides a pitch shift for the horn that dominates the sample, changing it from a single sound into a three-note melody. RZA also captures some of the open drums so that the track can breathe a bit before coming back to the jarring loop. As accidental as the discovery may have been, it is a very precisely arranged track, tailor-made for the attacking vocals of Ghostface, Solomon Childs, and the RZA himself.

"How to: fix a scratched record" by Flickr user Fred Scharmen, CC BY-NC-SA 2.0

“How to: fix a scratched record” by Flickr user Fred Scharmen, CC BY-NC-SA 2.0

“Stroke of Death” exemplifies how transformative sample-based composition can be. Other than by knowing the source material, the sample is hard to identify. You cannot figure out that the original composition is Wither’s “Ain’t No Sunshine” from the one note RZA sampled, especially considering the note has been manipulated into a three-note melody that appears nowhere in either rendition of the composition. It is sample based, yes, but also completely original.

Classifying a composition like this as a ‘happy accident’ downplays just how important the ear is in sample-based composition, particularly on the transformative end of the spectrum. J Dilla once said finding the mistakes in a record excited him and that it was often those mistakes he would try to capture in his production style. Working with vinyl as a source went a long way in that regard, as each piece of vinyl had the potential to have its own physical characteristics that affected what one heard. It’s hard to imagine “Stroke of Death” being inspired from a digital source. While digital files can have their own glitches, one that would create an internal loop on playback would be rare.


"Unpacking of the Proteus 2000" by Flickr user Anders Dahnielson, CC BY-NC-SA 2.0

“Unpacking of the Proteus 2000” by Flickr user Anders Dahnielson, CC BY-NC-SA 2.0

There has been a change in the sound of sampling over the past few decades. It is subtle but still perceptible; one can hear it even if a person does not know what it is they are hearing. It is akin to the difference between hearing a blues man play and hearing a music student play the blues. They technically are both still the blues, but the music student misses all of the blue notes.

The ‘blue notes’ of the blues were those aspects of the music that could not be transcribed yet were directly related to how the song conveyed emotion. It might be the fact that the instrument was not fully in tune, or the way certain notes were bent but others were not, it could even be the way a finger hit the body of a guitar right after the string was strummed. It goes back farther than the blues and ultimately is not exclusive to the African American tradition from which the phrase derives; most folk music traditions around the world have parallels. “The Rite of Spring” can be understood as Stravinsky ‘sampling’ the blue notes of Transylvanian folk music. In many regards sample-based composing is a modern folk tradition, so it should come as no surprise that it has its own blue notes.

The sample-based composition work of today is still sampling, but much of it lacks the blue notes that helped define the golden era of the art. I attribute this discrepancy to the evolution of technology over the last two decades. Many of the things that could be understood as the blue notes of sampling were merely ways around the limits of the technology. In the same way, the blue notes of most folk music happened when the emotion went beyond the standards of the instrument (or alternately the limits imposed upon it by the literal analysis of western theory). By looking at how the technology has evolved we can see how blue notes of sampling are being lost as key limitations are being overcome by “advances.”

e-muFirst, let’s consider the E-Mu SP-1200, which is still thought to be the most definitive sounding sampler for hip-hop styled sample-based compositions, particularly related to drums. The primary reason for this is its low-resolution sampling and conversion rates. For the SP-1200 the Analog to Digital (A/D) and Digital to Analog (D/A) converters were 12-bit at a sample rate of 26.04 kHz (CD quality is 16-bit 44.1 kHz). No matter what quality the source material, there would be a loss in quality once it was sampled into and played out of the SP-1200. This loss proved desirable for drum sounds particularly when combined with the analog filtering available in the unit, giving them a grit that reflected the environments from which the music was emerging.

Sp1200_Back_PanelOn top of this, individual samples could only be 2.5 seconds long, with a total available sample time of only 10 seconds. While the sample and conversion rates directly affected the sound of the samples, the time limits drove the way that composers sampled. Instead of finding loops, beatmakers focused on individual sounds or phrases, using the sequencer to arrange those elements into loops. There were workarounds for the sample time constraints; for example, playing a 33-rpm record at 45 rpm to sample, then pitching it back down post sampling was a quick way to increase the sample time. Doing this would further reduce the sample rate, but again, that could be sonically appealing.

An under appreciated limitation of the SP-1200 however, was the visual feedback for editing samples. The display of the SP-1200 was completely alpha numeric; there were no visual representations of the sample other than numbers that were controlled by the faders on the interface. The composer had to find the start and end points of the sample solely by ear. Two producers might edit the exact same kick drum with start times 100 samples (a fraction of a millisecond) apart. Were one of the composers to have recorded the kick at 45 rpm and pitched it down, the actual resolution for the start and end times would be different. When played in a sequence, these 100 samples affect the groove, contributing directly to the feel of the composition. The timing of when the sample starts playback is combined with the quantization setting and the swing percentage of the sequencer. That difference of 100 samples in the edit further offsets the trigger times, which even with quantization turned off fit into the 24 parts per quarter grid limitations of the machine.

akaiAkai’s MPC-60 was the next evolution in sampling technology. It raised the sample and conversion rates to 16-bit and 40 kHz. Sample time increased to a total of 13.1 seconds (upgradable to 26.2). Sequencing resolution increased to 96 parts per quarter. Gone was the crunch of the SP-1200, but the precision went up both in sampling and in sequencing. The main trademark of the MPC series was the swing and groove that came to Akai from Roger Linn’s Linn Drum. For years shrouded in mystery and considered a myth by many, in truth there was a timing difference that Linn says was achieved by delaying certain notes by samples. Combined with the greater PPQ resolution in unquantized mode, even with more precision than the SP-1200, the MPC lent itself to capturing user variation.

Despite these technological advances, sample time and editing limitations, combined with the fact that the higher resolution sampling lacked the character of the SP-1200, kept the MPC from being the complete package sample composers desired. For this reason it was often paired with Akai’s S-950 rack sampler. The S-950 was a 12-bit sampler but had a variable sample rate between 7.5 kHz and 40 kHz. The stock memory could hold 750 KB of samples which at the lowest sample rate could garner upwards of 60 seconds of sampling and at the higher sample rates around 10 seconds. This was expandable to up to 2.5 MB of sample memory.


The editing capabilities made the S-950 such a powerful sampler. Being able to create internal sample loops, key map samples to a keyboard, modify envelopes for playback, and take advantage of early time stretching (which would come of age with the S-1000)—not to mention the filter on the unit—helped take sampling deeper into the sound design territory. This again increased the variable possibilities from composer to composer even when working from the same source material. Often combined with the MPC for sequencing, composers had the ultimate sample-based composition workstation.

Today, there are literally no limitations for sampling. Perhaps the subtlest advances have developed the precision with which samples can be edited. With these advances, the biggest shift has been the reduction of the reliance on ears. Recycle was an early software program that started to replace the ears in the editing process. With Recycle an audio file could be loaded, and the software would chop the sample into component parts by searching for the transients. Utilizing Recycle on the same source, it was more likely two different composers could arrive at a kick sample that was truncated identically.

waveformAnother factor has been the waveform visualization of samples for editing. Some earlier hardware samplers featured the waveform display for truncating samples, but the graphic resolution within the computer made this even more precise. By looking at the waveform you are able to edit samples at the point where a waveform crosses the middle point between the negative and positive side of the signal, known as the zero-crossing. The advantage of zero-crossing sampling is that it prevents errors that happen when playback goes from either side of the zero point to another point in one sample, which can make the edit point audible because of the break in the waveform. The end result of zero-crossing edited samples is a seamlessness that makes samples sound like they naturally fit into a sequence without audible errors. In many audio applications snap-to settings mean that edits automatically snap to zero-crossing—no ears needed to get a “perfect” sounding sample.

It is interesting to note that with digital files it’s not about recording the sample, but editing it out of the original file. It is much different from having to put the turntable on 45 rpm to fit a sample into 2.5 seconds. Another differentiation between digital sample sources is the quality of the files, whether original digital files (CD quality or higher), lossless compression (FLAC), lossy compressed (MP3, AAC) or the least desirable though most accessible, transcoded (lossy compression recompressed such as YouTube rips). These all result in a different degradation of quality than the SP-1200. Where the SP-1200’s downsampling often led to fatter sounds, these forms of compression trend toward thinner-sounding samples.


Some producers have created their own sound using thinned out samples with the same level of sonic intent as The RZA’s on “Stroke of Death.” The lo-fi aesthetic is often an attempt to capture a sound to parallel the golden era of hardware-based sampling. Some software-based samplers by example will have an SP-1200 emulation button that reduces bit rates to 12-bit. Most of software sequencers have groove templates that allow for the sequencers to emulate grooves like the MPC timing.

Perhaps the most important part of the sample-based composition process however, cannot be emulated: the ear. The ear in this case is not so much about the identification of the hot sample. Decades of history should tell us that the hot sample is truly a dime a dozen. It takes a keen composer’s ear to hear how to manipulate those sounds into something uniquely theirs. Being able to listen for that and then create that unique sound—utilizing whatever tools— that is the blue note of sampling. And there is simply no way to automate that process.

Featured image: “Blue note inverted” by Flickr user Tim, CC BY-ND 2.0

Primus Luta is a husband and father of three. He is a writer and an artist exploring the intersection of technology and art, and their philosophical implications.  He maintains his own AvantUrb site. Luta was a regular presenter for Rhythm Incursions. As an artist, he is a founding member of the collective Concrète Sound System, which spun off into a record label for the exploratory realms of sound in 2012. Recently Concréte released the second part of their Ultimate Break Beats series for Shocklee.

tape reelREWIND!…If you liked this post, you may also dig:

“SO! Reads: Jonathan Sterne’s MP3: The Meaning of a Format”-Aaron Trammell

“Remixing Girl Talk: The Poetics and Aesthetics of Mashups”-Aram Sinnreich

“Sound as Art as Anti-environment”-Steven Hammer

%d bloggers like this: