[LAD] Sending huge SysEx files via ALSA

[Ralf Mardorf]

Gabriel M. Beddingfield wrote:
>
> Hi Christoph,
>
> On Mon, 27 Jul 2009, Christoph Eckert wrote:
>>
>> I'm currently playing with some code that sends SysEx data to ALSA using
>> RtMidi¹. I get an error reported by the latter one as soon as the 
>> size of the
>> message exceeds 16355 bytes. Unfortunately, I have such SysEx files 
>> of two
>> devices (namely a Waldorf Microwave I and a Digitech Studio Quad).
>>
>> Can anyone comment whether this is a limitation in ALSA, and in case 
>> it is if
>> there are coding workarounds? AFAIR ALSA splits incoming SysEx-events 
>> into
>
> Have you tried doing SysEx dumps with amidi?[1] It might give you more 
> insight into whether the problem is ALSA or RtMidi.
>
> Peace,
> Gabriel
>
> [1] On Debian, this is in the package 'alsa-utils'

Hi :)

on my system it's possible to receive more than 16355 bytes. It might be 
hat the TG33 sends "F0 [...] F7" blocks. Should I take a look at this? 
Does amidi work for your system?

spinymouse-sudo at 64studio:~$ amidi -l
Dir Device    Name
IO  hw:0,0    TerraTec EWX24/96 MIDI
IO  hw:1,0,0  USB Device 0x170b:0x11 MIDI 1
spinymouse-sudo at 64studio:~$ amidi -p hw:1,0,0 -t 8 -r 
/mnt/music/studio3.0b/SysEx/2009-07-27/YamahaTG33dAlltAll.syx

40981 bytes read
spinymouse-sudo at 64studio:~$ ls -Al /mnt/music/studio3.0b/SysEx/2009-07-27
total 44
-rw-r--r-- 1 spinymouse-sudo spinymouse-sudo 40981 2009-07-27 10:27 
YamahaTG33dAlltAll.syx
spinymouse-sudo at 64studio:~$

Cheers,
Ralf