MIDI Forum

The XK1 uses a 3.3 V supply. At that voltage, 120 Ω + 22 Ω actually is too much. And the inputs always should use 220 Ω. (The noise filtering is fine,...

The standard circuit uses an NPN or a logic output with 2× 220 Ω. Using a PNP as a voltage follower is unusual, but will work. The resistors are to...

If have not found anything in the Data List, but I do not know how the Genos works. What MIDI messages does it transmit when you change these volum...

Which reasons might prevent us from representing tones merely with their fundamental frequencies? Interoperability. Both controllers and synthesizers...

The driver page says it supports Windows 10.

See, for example, stackoverflow.com/questions/44410914/sending-a-system-exclusive-message-using-coremidi. For most devices, the device ID is 0x10. ...

FPGAs must be programmed. It is that proprietary programming that you would have to change.

The optocoupler circuit is fine. SoftwareSerial is not reliable; it will read wrong bits when its code does not manage to get executed early enough...

RIFF "RMID" files contain exactly one SMF file in the "data" chunk. But the file might contain other chunks; Microsoft suggests that "INFO" makes sens...

The USB MIDI class specification has no such restriction. What you are seeing is caused by the driver in the specific version of Windows you're usi...

By default, anything played on channel 10 is drums. It is possible that this setting was changed on the E-473 and that that file does not reset it, o...

In general, when you exceed the polyphony, the oldest note gets stopped. Start one note with a distinct sound, then start 128 other notes (with diffe...

I just searched for "F0 41 10 00 00 72 12", and found a forum post that said that such a SysEx is sent when an RC-505 key is pressed. I guess 8 ident...

That SysEx looks valid. Manufacturer ID (65) is Roland; device ID is 16 = default; model ID is 0 0 114 (Boss RC-505 ???); 18 looks like data set 1; 0...

I've never used Arduinos, but I've heard that software serial has problems like that, and you should use hardware serial. Howver, the Mega 2560 appea...