![]() ![]() A highly percussive Finger Snap offers an alternative to snares or claps and sounds great when layered. ![]() Modified TR-909 kick and snare take the classic combo into new territory with enhanced attack characteristics. Aside from the original TR-707 and TR-727 sounds, the 7X7 expansion includes four new, never-before-heard sounds inspired by the original TR engineers. All 30 original TR-707 and TR-727 sounds-each with Tune and Decay controls-open up a whole world of sonic possibilities. A Seven in Your Eight…And Then SomeĪdding the 7X7 Drum Machine Expansion takes the experience of playing a TR-8 to a whole new level. Modeling the analog envelope and amplifier stages that came after the D/A converter allowed us to implement the “Tune” and “Decay” parameters that are available on the TR-8, but not present on the original units. We then used our ACB process to completely model the PCM output stage, carefully including all of its quirks and instabilities. To replicate these sounds for the TR-8, we started with the original PCM wave data found on the classic machines. Also, at the time these units were developed, deviations in the clock that triggered the PCM caused differences in pitch, and deviations in the analog circuitry downstream of the D/A converter caused variances in decay characteristics. To reduce quantization noise, a clever design was employed where PCM sound was produced using non-decaying waveforms and decay was then introduced in the analog circuitry after being converted. Due to the low bit-rates of the original units, quantization noise became a problem, particularly during the sound’s decay. Capturing the OriginalsĮven though the TR-707 and TR-727 were primarily digital devices, it would not have been possible to perfectly replicate their sound using samples. ![]() Though the TR-707 and TR-727 were developed primarily for rhythm programming and did not give users the ability to edit their sounds, they were ultimately appreciated for their characteristic lo-fi punch and continue to be sought after to this day. We embraced this trend with the TR-707 and TR-727, but expensive memory and lack of high-precision D/A converters resulted in a 25kHz, 8-bit (or 6-bit for some tones) sample playback engine that was primitive by today’s standards. Also, while PCM sound generation could produce more realistic drum sounds, it offered little in the way of tone editing.Īfter the TR-909’s release however, digital PCM became the trend for synthesizers and drum machines. As memory chips and digital-to-analog converters were very expensive at the time, there was concern that an all-digital design would make the product unaffordable for too many musicians. The TR-707’s predecessor, the TR-909, was developed as an analog-digital hybrid rather than a fully digital device. Upgrades the TR-8 to have all the sounds and articulations of four iconic TR drum machines, plus all new sounds, in one performance-ready instrument.Four entirely new TR-8 sounds including modified TR-909 kick, TR-909 snare and all new clap and snap sounds. ![]()
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