Timbre — MIDI Implementation Chart

Reconfigurable Analog Polyphonic Synthesizer

MIDI Implementation Chart

Manufacturer: Tonifex

Model: Timbre

Date: 2026.03.08

Version: 1.0

Function	Transmitted	Recognized	Remarks
Basic Channel
Default	1	1	MPE: manager ch 1
Changed	1–16	1–16
Mode
Default	Mode 3	Mode 3
Messages	×	Mode 3, 4	Mode 4 = MPE
Altered
Note Number
True Voice	×	0–127
		24–108	Musically useful range
Velocity
Note On	×	○	VCA gain + filter offset
Note Off	×	○	MPE lift velocity
After Touch
Key's (poly)	×	○	Per-note: filter, VCA, osc mode
Ch's (channel)	×	○	Configurable target
Pitch Bend	×	○	Per-ch in MPE; SC clock ratio
Control Change
1 Mod Wheel	×	○	LFO depth
7 Volume	×	○
10 Pan	×	○	64 = center
64 Sustain	×	○	On manager ch (MPE)
71 Resonance	×	○	SC block capacitor ratio
74 Brightness / Slide	×	○	MPE: osc mode morph
91 Reverb Send	×	○	If external FX present
120 All Sound Off	×	○	Immediate silence
123 All Notes Off	×	○	Respects sustain pedal
Program Change	×	○	Stored presets
System Exclusive	○	○	Mfr ID: 0x7D (dev) / TBD
System Common
Song Position	×	×
Song Select	×	×
Tune Request	×	×
System Real Time
Clock	×	○	LFO sync to external clock
Start / Stop	×	○	Sequencer transport
Aux Messages
Local On/Off	×	×	No internal keyboard
All Notes Off	×	○	CC 123
Active Sensing	×	○	Monitors for 300 ms timeout
System Reset	×	○	Returns to power-on state
Identity Reply	○	×	Universal SysEx (Phase 1+)

Mode 1: OMNI ON, POLY Mode 2: OMNI ON, MONO Mode 3: OMNI OFF, POLY Mode 4: OMNI OFF, MONO

○ = Yes × = No

SysEx Command Summary

Command	Byte	Direction	Description
Version Query	`01`	Host → Timbre	Request firmware version
Version Reply	`02`	Timbre → Host	ASCII version string
Patch Dump Req	`10`	Host → Timbre	Request stored patch
Patch Dump	`11`	Either	Complete patch state
Patch Load	`12`	Host → Timbre	Write patch to storage
Param Get	`20`	Host → Timbre	Query single parameter
Param Set	`21`	Host → Timbre	Set single parameter
Param Reply	`22`	Timbre → Host	Response to Param Get
Voice Arch Query	`30`	Host → Timbre	Query voice topology
Voice Arch Reply	`31`	Timbre → Host	SC block config map
Diag Reg Read	`40`	Host → Timbre	Read PSoC register
Diag Reg Reply	`41`	Timbre → Host	Register contents
Diag Reg Write	`42`	Host → Timbre	Write PSoC register

Descriptor	Value	Notes
idVendor	`0x303A`	Espressif Systems (dev); production PID via allocation
idProduct	TBD	Phase 3
iManufacturer	"Tonifex"
iProduct	"Timbre"	Appears in DAW MIDI preferences
bcdDevice	YYMM	Date-based firmware version
bDeviceClass	`0x01` Audio
bDeviceSubClass	`0x03` MIDI Streaming	Class-compliant, no driver

Configuration	Manager	Members	Use Case
Full lower zone (default)	Ch 1	2–16 (15)	Single controller, full MPE
Split — lower + upper	1, 16	2–8, 9–15	Two controllers / split
Lower zone — reduced	Ch 1	2–5 (4)	Phase 2 prototype
Standard MIDI	—	1–16	Legacy / multi-timbral

Default MCM Sequence (Lower Zone, 15 members)
`B0 65 00`	CC#101 = 0 (RPN MSB) on ch 1
`B0 64 06`	CC#100 = 6 (RPN LSB) on ch 1
`B0 06 0F`	CC#6 = 15 (Data Entry) on ch 1

Stage	USB	DIN	Notes
Transport	≤1 ms	~1 ms	USB host poll / DIN serial
ESP32 MIDI parse	~50 µs	~50 µs	Running buffer, channel routing
Voice allocation	~10 µs	~10 µs	Round-robin / lowest-available
I2C write	~200 µs	~200 µs	8 bytes @ 400 kHz Fast Mode
PSoC register apply	<12 µs	<12 µs	Analog block config propagation
SC settling	~100 µs	~100 µs	Switched-cap filter steady state
Total (single voice)	~1.3 ms	~1.4 ms	Well under 3 ms threshold