Skip to content

Commit

Permalink
improve GS sysex support
Browse files Browse the repository at this point in the history 
I found some good docs on this, let's go!
  • Loading branch information
@spessasus
spessasus committed Jun 7, 2024
1 parent 5a0320d commit d1b43e0
Show file tree
Hide file tree
Showing 2 changed files with 88 additions and 35 deletions.
120 changes: 86 additions & 34 deletions src/spessasynth_lib/synthetizer/synthetizer.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -526,50 +526,99 @@ export class Synthetizer {

// this is a roland sysex
// http://www.bandtrax.com.au/sysex.htm
// https://cdn.roland.com/assets/media/pdf/AT-20R_30R_MI.pdf
case 0x41:
// messagedata[1] is device id (ignore as we're everything >:) )
if(messageData[2] === 0x42 && messageData[3] === 0x12)
{
// this is a GS sysex

if(messageData[7] === 0x00 && messageData[6] === 0x7F)
// messageData[5] and [6] is the system parameter, messageData[7] is the value
if(messageData[6] === 0x7F)
{
// this is a GS reset
console.info("%cGS system on", consoleColors.info);
this.system = "gs";
// GS mode set
if(messageData[7] === 0x00) {
// this is a GS reset
console.info("%cGS system on", consoleColors.info);
this.system = "gs";
}
else if(messageData[7] === 0x7F)
{
// GS mode off
console.info("%cGS system off, switching to GM2", consoleColors.info);
this.system = "gm2";
}
return;
}
else
if(messageData[6] === 0x15 && messageData[4] === 0x40)
{
// this is the Use for Drum Part sysex (multiple drums)
// determine the channel 0 means channel 10 (default), 1 means 1 etc.
const channel = [9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15][messageData[5] & 0x0F]; // for example 1A means A = 11, which corresponds to channel 12 (counting from 1)

this.setDrums(channel, messageData[7] > 0 && messageData[5] >> 4); // if set to other than 0, is a drum channel
console.info(
`%cChannel %c${channel}%c ${this.synthesisSystem.midiChannels[channel].percussionChannel ?
"is now a drum channel"
:
"now isn't a drum channel"
}%c via: %c${arrayToHexString(messageData)}`,
consoleColors.info,
consoleColors.value,
consoleColors.recognized,
consoleColors.info,
consoleColors.value);

}
else
if(messageData[4] === 0x40 && messageData[6] === 0x06 && messageData[5] === 0x00)
if(messageData[4] === 0x40)
{
// roland master pan
console.info(`%cRoland Master Pan set to: %c${messageData[7]}%c with: %c${arrayToHexString(messageData)}`,
consoleColors.info,
consoleColors.value,
consoleColors.info,
consoleColors.value);
this.panController.pan.value = (messageData[7] - 64) / 64;
// this is a system parameter
if(messageData[6] === 0x15)
{
// this is the Use for Drum Part sysex (multiple drums)
// determine the channel 0 means channel 10 (default), 1 means 1 etc.
const channel = [9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15][messageData[5] & 0x0F]; // for example 1A means A = 11, which corresponds to channel 12 (counting from 1)

this.setDrums(channel, messageData[7] > 0 && messageData[5] >> 4); // if set to other than 0, is a drum channel
console.info(
`%cChannel %c${channel}%c ${this.synthesisSystem.midiChannels[channel].percussionChannel ?
"is now a drum channel"
:
"now isn't a drum channel"
}%c via: %c${arrayToHexString(messageData)}`,
consoleColors.info,
consoleColors.value,
consoleColors.recognized,
consoleColors.info,
consoleColors.value);
return;
}
else
if(messageData[5] === 0x00 && messageData[6] === 0x06)
{
// roland master pan
console.info(`%cRoland GS Master Pan set to: %c${messageData[7]}%c with: %c${arrayToHexString(messageData)}`,
consoleColors.info,
consoleColors.value,
consoleColors.info,
consoleColors.value);
this.panController.pan.value = (messageData[7] - 64) / 64;
return;
}
else
if(messageData[5] === 0x00 && messageData[6] === 0x05)
{
// roland master key shift (transpose)
const transpose = messageData[7] - 64;
console.info(`%cRoland GS Master Key-Shift set to: %c${transpose}%c with: %c${arrayToHexString(messageData)}`,
consoleColors.info,
consoleColors.value,
consoleColors.info,
consoleColors.value);
this.transpose(transpose);
return;
}
else
if(messageData[5] === 0x00 && messageData[6] === 0x04)
{
// roland GS master volume
console.info(`%cRoland GS Master Volume set to: %c${messageData[7]}%c with: %c${arrayToHexString(messageData)}`,
consoleColors.info,
consoleColors.value,
consoleColors.info,
consoleColors.value);
this.setMainVolume(messageData[7] / 127);
}
else
{
// this is some other GS sysex...
console.info(`%cUnrecognized Roland %cGS %cSysEx: %c${arrayToHexString(messageData)}`,
consoleColors.warn,
consoleColors.recognized,
consoleColors.warn,
consoleColors.unrecognized);
return;
}
}
else
{
Expand All @@ -579,6 +628,7 @@ export class Synthetizer {
consoleColors.recognized,
consoleColors.warn,
consoleColors.unrecognized);
return;
}
}
else
Expand All @@ -591,13 +641,15 @@ export class Synthetizer {
consoleColors.value,
consoleColors.info,
consoleColors.value);
return;
}
else
{
// this is something else...
console.info(`%cUnrecognized Roland SysEx: %c${arrayToHexString(messageData)}`,
consoleColors.warn,
consoleColors.unrecognized);
return;
}
break;

Expand Down
3 changes: 2 additions & 1 deletion src/spessasynth_lib/synthetizer/worklet_system/worklet_system.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -617,7 +617,8 @@ export class WorkletSystem {
case dataEntryStates.Idle:
break;

//https://cdn.roland.com/assets/media/pdf/SC-88PRO_OM.pdf
// https://cdn.roland.com/assets/media/pdf/SC-88PRO_OM.pdf
// http://hummer.stanford.edu/sig/doc/classes/MidiOutput/rpn.html
case dataEntryStates.NRPFine:
switch(this.midiChannels[channel].NRPCoarse)
{
Expand Down

0 comments on commit d1b43e0

Please sign in to comment.