[alsa-devel] Help requested: new HSS1394 MIDI back-end

Clemens Ladisch clemens at ladisch.de
Mon May 28 16:58:39 CEST 2012

Sean M. Pappalardo - D.J. Pegasus wrote:
> I just updated my kernel and tried it with the SCS.1m but unfortunately it reports an error:
> firewire_core: created device fw1: GUID 0012600000000000, S400
> snd_scs1x fw1.0: transaction failed: type error

This is from a snd_fw_transaction call, either the ping or the address

Please check if these commands work:

	firewire-request /dev/fwX read c007dedadada 4
	firewire-request /dev/fwX write c007dedadada f100123456789abc

In theory, you should be able to write MIDI commands by prefixing them
with 00, like this for a note-on:
	firewire-request /dev/fwX write c007dedadada 00912345

> Turning on the SCS.1d then yields:
> firewire_core: created device fw2: GUID 0012600100000000, S400

FFADO had only the 1m's ID, so the driver does not yet know about the 1d.


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