Pitch Sequencer Turns Tascam Tape Deck Into Instrument

ByJosephine J. Romero

May 12, 2022 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
Pitch Sequencer Turns Tascam Tape Deck Into Instrument

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The great detail about magnetic tape is that by various the pace at which you perform it again, you can range the pitch of the output. [Issac] determined to acquire edge of this, executing a extravagant digitally-controlled pitch mod on his Tascam Porta 02 tape deck.

The develop utilizes a Raspberry Pi Pico, which employs PWM to command the velocity of the tape drive’s motor. This is realized with the use of an NPN transistor driven by the PWM output of the Pico. This allows precise management of motor speed, and as a result pitch.

With that sorted out, the challenge was fleshed out with an OLED screen and a rotary encoder. These allow for numerous patches or scripts to be operate on the Pico, managing the motor speed of the tape player in a variety of strategies. With a bit of get the job done, [Issac] was also ready to build a purpose that converted MIDI be aware values into PWM values that decide many motor speeds.

The normal factor to do up coming was to set in a tape with a looping sample at a set pitch, and then change it in a sequence controlled by the Pico. The 8 methods of the sequence can be manually set with the rotary handle, and in potential, [Issac] even programs to insert a authentic MIDI input, permitting the method to act as a monophonic synth.

If you choose other routes to pitch shifting shenanigans, check out out this project. Online video right after the crack.

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