>> Try running only "amidi --dump -p virtual", and then connecting the
hardware sequencer port to the virtual on
It works fine when amidi connects to it. Shows 3 bytes for each key
on/key off.
>> When the sequencer converts the messages back to raw MIDI bytes, it
uses running status by default. This is not an error.
I'm aware of running status, but I don't think that's the problem. This
is what I get for a single key press if I log each byte I read:
90
4B
80
00
This is multiple presses and releases of the same key at different
velocities:
90
3C
80
00
90
3D
80
00
90
3C
80
00
90
43
80
00
90
01
80
00
As you can see, there's a key on, and then a second byte (which seems to
be the velocity), but no byte to indicate which key is being pressed!
I'm reading the data byte per byte, from a blocking port:
byte byteVal;
int err;
if ((err = snd_rawmidi_read(m_inHandle, &byteVal, sizeof(byteVal)))
< 0)
{
std::cout << "Can't read MIDI input: " << snd_strerror(err) <<
std::endl;
throw BadInput();
}
std::cout << charToHex(byteVal) << std::endl;
I'm at a loss to see what I'm doing wrong. There's nothing fancy going
on in my reading loop.
- Maxime
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