Sequential Circuits TOM Drum Machine with Data Cartridge SN 01024

via this auction

"The TOM Digital Drum Machine includes 8 basic drum kit sounds: kick, snare, 2 toms, open / closed hat, clap and crash. The Sequential Circuits Tom had an interesting feature for an early drum machine; each sound could be dynamically allocated between the voices, so you could even use 4 copies of the same sound simultaneously. Other features include the ability to play the sounds backwards, MIDI controllable parameters and support for sound cartridges, which let you add 7 additional samples to the 6 built-in rock drum kit samples. Included with this TOM is the rare “Latin Percussion” expansion sound cartridge.

TOM's sequencer allows you to record rhythm patterns in real time or step time. It can store up to 99 patterns and each pattern can be up to 99 measures! As many as 99 patterns can be linked to form Songs. Sequencer memory holds 2,300 notes. The TOM also featured an "Improv Factor" to create drum fills which can add variation to your patterns. TOM's "Human Factor" allowed you to program minor changes in the tuning and volume of your patterns for a 'humanzied' feel - before that term existed in the sequencing lexicon. The TOM also had a "Reframe" function that let you change the location of the down-beat in your pattern at the touch of a button. The TOM has a drum-pad-programmable trigger out which allows it to synch with pre-midi sequencers and arpeggiators in keyboards such as the Roland SH-101.

The TOM's memory is retained via internal battery backup when powered down. Program memory can also be saved/loaded to casette tape.

I have “modded” this TOM to use a single AA battery, rather than the expensive and hard to find lithium backup battery. A lithium backup battery can still be used, if preferred, but one is not included with this TOM. The AA battery will retain the program memory for 6 months to a year."