On Fri, 30 Aug 2019 03:14:56 +0200, Takashi Sakamoto wrote: > > MOTU 4pre was launched in 2012 by MOTU, Inc. This commit allows userspace > applications can transmit and receive PCM frames and MIDI messages for > this model via ALSA PCM interface and RawMidi/Sequencer interfaces. > > The device supports MOTU protocol version 3. Unlike the other devices, the > device is simply designed. The size of data block is fixed to 10 quadlets > during available sampling rates (44.1 - 96.0 kHz). Each data block > includes 1 source packet header, 2 data chunks for messages, 8 data chunks > for PCM samples and 2 data chunks for padding to quadlet alignment. The > device has no MIDI, optical, BNC and AES/EBU interfaces. > > Like support for the other MOTU devices, the quality of playback sound > is not enough good with periodical noise yet. > > $ python2 crpp < ~/git/am-config-rom/motu/motu-4pre.img > ROM header and bus information block > ----------------------------------------------------------------- > 400 041078cc bus_info_length 4, crc_length 16, crc 30924 > 404 31333934 bus_name "1394" > 408 20ff7000 irmc 0, cmc 0, isc 1, bmc 0, cyc_clk_acc 255, max_rec 7 (256) > 40c 0001f200 company_id 0001f2 | > 410 000a41c5 device_id 00000a41c5 | EUI-64 0001f200000a41c5 > > root directory > ----------------------------------------------------------------- > 414 0004ef04 directory_length 4, crc 61188 > 418 030001f2 vendor > 41c 0c0083c0 node capabilities per IEEE 1394 > 420 d1000002 --> unit directory at 428 > 424 8d000005 --> eui-64 leaf at 438 > > unit directory at 428 > ----------------------------------------------------------------- > 428 0003ceda directory_length 3, crc 52954 > 42c 120001f2 specifier id > 430 13000045 version > 434 17103800 model > > eui-64 leaf at 438 > ----------------------------------------------------------------- > 438 0002d248 leaf_length 2, crc 53832 > 43c 0001f200 company_id 0001f2 | > 440 000a41c5 device_id 00000a41c5 | EUI-64 0001f200000a41c5 > > Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx> Applied, thanks. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
