[LAU] Standard Sample Dump with amidi

Hi there, I'm currently trying to send samples to a semi-ancient synthesizer (a Yamaha SY99), which has a sample RAM of 512kB built in. The way I do it, the synth seems to receive "something" but doesn't really acknowledge that it has received the whole sample and is acting strange afterwards (won't make a sound until I turn off and on the machine and then there seems to be only garbage in the memory). I understand that the intersection between the sets of SY99 users and Linux users is probably quite small and that I may have to ask on the SY99 list at Yahoo what the synth's behaviour means. But I couldn't find any definite answers as to whether what I do on the Linux side is any good: I save the sample as mono, 16bit, 48000kHz (which the synth is supposed to be able to handle) and in ".sds" format (using Sweep, which uses libsndfile). The beginning few bytes of that file seem to be compliant with a midi sysex dump. Then I use the following command to send it to the synth ("hw:0,0" being the midi port of my M-Audio Audiophile): amidi -p hw:0,0 -s sample.sds Is this supposed to work at all or am I missing something? Thanks, Mirko