>> looking at the code, the relevant changes are definitely there for jack;
>> and alsa will most likely work if it's not trying to do mmap() - if the
>> device does support mmap we might have problems.
In s_audio_alsamm.c there is an implicit typecast from t_sample to float in line 1208 where the samples are copied (function alsamm_send_dacs()). And for the input a typecast is at line 1316. This makes me think doubles could work with alsa mmap as well. Can't test it though.
I will not have time to work on the Pd double precision thing till after Pd con, but will resume testing later, on OSX, Linux and maybe Windows.
Katja