[linux-audio-user] Midi data arrives, but gets stuck in ALSA's buffer

[Jens Gulden]

Hello,

>> Does the same happen if you run "amidi -d -p hw:2,0" when no other
>> program is connected?

amidi is not included in Musix, but alsa-utils-1.10rc3 can be compiled on Musix 0.39 (./configure, 
make).
Running

amidi -d -p hw:X

successfully DOES dump the incoming midi data.
However, even trying to simply play a .mid-file with aplaymidi fails, leading to this:

cat /proc/asound/cardX/midi0 ->

UM-1

Output 0
   Tx bytes : 0
   Mode : native
   Buffer size: 4096
   Avail: 4045  (!!)
Input 0
   Ry bates : 0

To mention it again: this happens with the realtime-kernels of the GNU-Musix live-distribution, but 
not with the ordinary kernels.

Hope this helps,
Jens


Clemens Ladisch schrieb:
> Jens Gulden wrote:
> 
>>cat /proc/asound/card2/midi0 ->
>>
>>MidiSport 2x2
>>
>>Output 0
>>   Tx bytes     : 0
>>Output 1
>>   Tx bytes     : 0
>>Input 0
>>   Rx bytes     : 1186
>>   Buffer size  : 4096
>>   Avail        : 1186  <--- ### SHOULD BE 0, NOT ==RX BYTES! ###
>>   Overruns     : 0
>>Input 1
>>   Rx bytes     : 0
>>
>>Instead of passing the data further to the connected timidity, it gets
>>stuck in the receive-buffer. 
>>When 4096 is reached, overruns start to count up.
> 
> 
> Does the same happen if you run "amidi -d -p hw:2,0" when no other
> program is connected?
> 
> 
> Regards,
> Clemens