i2c2midi — MIDI Buffer Example Patches

Demonstrating i2c2midi's MIDI Buffer feature introduced with Firmware v4.3.

More info on Github: https://github.com/attowatt/i2c2midi

--

MIDI Buffer
i2c2midi's MIDI buffer behaves much like a looping tape recorder, recording every MIDI note that leaves i2c2midi into the buffer. When the buffer reaches its end, it starts over and plays back the recorded notes, while new notes are recorded (overdubbed). Notes in the buffer can be modified with each buffer iteration. Change the note pitch via I2M.B.NSHIFT and I2M.B.VSHIFT, change note velocity via I2M.B.FB, I2M.B.VSHIFT and I2M.B.VOFF, change note duration via I2M.B.TSHIFT and I2M.B.TOFF. When notes reach a velocity of zero they get deleted from the buffer. However, notes can be held in the buffer indefinitely by setting I2M.B.FB to 0. Furthermore, the speed and playback direction of the buffer can be set, as well as the length and a start and end offset.

The buffer can work in two modes, set via I2M.B.MODE: 1) Digital 2) Tape. In Digital mode, the buffer speed ( set via I2M.B.SPE) works independent of note number and note duration: If the buffer speed changes, the note number and note duration of a recorded note stays unaffected. In Tape mode on the other hand, the buffer speed affects the note number and note duration of recorded notes in the buffer, mimicking the behaviour of real tape. If the buffer speed gets doubled, the note number is pitched up by one octave and the note duration gets divided in half. Similarly, if the buffer speed gets divided in half, the note number is pitched down an octave and the note duration gets doubled, etc.
Depending on its length, the buffer can act more like a looper or more like a pitch-shifting delay for MIDI notes.

--

Example Patches:
00:00 Example I
01:24 Example II
01:57 Example III
02:18 Example IV
02:42 Example V
03:13 Example VI
03:32 Example VII
03:50 Example VIII
04:20 Example IX
04:40 Example X
05:23 Example XI


--

About i2c2midi
i2c2midi is a DIY open source 2 HP Teletype Expander that speaks I2C and MIDI. It bridges the gap between monome Teletype and external MIDI-enabled devices, using I2C:
→ It receives I2C messages from Teletype and converts them to MIDI notes, MIDI CC messages and other MIDI messages to control external devices like synths and effects.
← It receives MIDI messages from external MIDI controllers and stores the values internally, which can be requested at any time by Teletype via I2C.

--