Replacement EEPROM Sound Chips for the Sequential Circuits Drumtraks

These were designed and tested for the sampling frequencies and built-in filtering used on the Drumtraks, but will also work and sound relatively similar in any other Drum Machine of the era that uses the same 4K (2732) or 8K (2764) EPROM chips - including the Sequential Circuits TOM, Oberheim DMX/DX, Linn Drum etc.

Note that the Bassdrum & 909 Bassdrum chips are 24-pin, 4K chips and will only work in a 24-pin socket (ie the Bassdrum chip socket of the Drumtraks).

All the other chips are 8K (2764) 28-pin and can be placed in any of the other EPROM sound chip sockets of the Drumtraks - but the sampling frequency/filtering may vary depending on the socket you choose! The ideal placement should be intuitive based on the sound - except perhaps the Dog Bark/Armando chip, which I used as a replacement for the original Cowbell/Cabasa chip.

All of the non-original sounds are my own creation, tested and fine-tuned for the ideal frequency and to remove any clicks or white noise artifacts.

Tom (Short vers) - The original Sequential Tom sound, but with the decay shortened for a tighter sound.

909 Bassdrum & 909 Snare/Rim - I picked my favorite original 909 samples for these. Think classic house ala Todd Terry more than gabber etc

Dog Bark/Armando - The best sounding "dog bark" I could find, and the classic stuttered sample used in Armando's "100% Of Dissin You"

Sound clips available by request. I can also burn your own custom samples to EEPROMS for an additional fee.

The Drumtraks OS 0.5 enables MIDI send/receive of tuning information for each sound - pitch the sounds using CC1 (Pitch Bend). Essential!

EEPROMS ship in proper hard plastic anti-static IC packaging.

Note: Do not remove the sticker/label on the EEPROM, as this covers the "erase window" on the chip and exposure to light may corrupt the data!

TIP: The Drumtraks has room to use ZIF sockets inserted into the original EPROM sockets - this makes switching chips  easier/faster