Hello everyone.
I have problems to get my BBB-Hermes-Cronus-Buffalo-IIIsePro38 build to work. I already asked this question throughout different official TP threads, but I think it is just confusing to post in these different threads, so I opened a new one just dealing with my problem with the hope to finally get it working
. So, here we go...
The Buffalo does actually work with an external SPDIF signal fed in through the "GND" and "SPDIF" connectors and the Buffalo switch 1, position 1 to "ON" for SPDIF input. Then the "LOCK" LED lights up and I can listen to music.
Hence, the problem must lay in the BBB-Hermes-Cronus combo producing a PCM signal (for which I move the above switch to "OFF" for SERIAL(PCM/DSD) input. On the BBB I run the prepared Debian distro including Botic by twluke: https://www.diyaudio.com/forums/twisted-pear/258254-support-botic-linux-driver-258.html#post5515941. Below are the outputs of some important commands:
While letting speaker-test run I could not identify an output signal with a multimeter set to mV and AC. At the input header I could only detect a signal of 1,6V AC at pin 9 for the "MCK_IN", but not for "DCK_OUT", "D1_OUT", or "D2_OUT" (see attached picture). Also of 3,4V DC at pin 10 and 20.
Q2: Shouldn't I measure a signal at the inputs for "DCK_OUT", "D1_OUT", or "D2_OUT"?
Q3: What could be the reason for just getting a signal at "MCK_IN"?
Q4: Is there any measurement I could do for finding the problem?
As always I attached some picture in the hope that someone spots a stupid mistake
. Thank you very much for your help!
I have problems to get my BBB-Hermes-Cronus-Buffalo-IIIsePro38 build to work. I already asked this question throughout different official TP threads, but I think it is just confusing to post in these different threads, so I opened a new one just dealing with my problem with the hope to finally get it working
The Buffalo does actually work with an external SPDIF signal fed in through the "GND" and "SPDIF" connectors and the Buffalo switch 1, position 1 to "ON" for SPDIF input. Then the "LOCK" LED lights up and I can listen to music.
Hence, the problem must lay in the BBB-Hermes-Cronus combo producing a PCM signal (for which I move the above switch to "OFF" for SERIAL(PCM/DSD) input. On the BBB I run the prepared Debian distro including Botic by twluke: https://www.diyaudio.com/forums/twisted-pear/258254-support-botic-linux-driver-258.html#post5515941. Below are the outputs of some important commands:
Q1: Someone said that the output of speaker-test indicates that the BBB recognizes the clocks on the Cronus. Which signals does that include exactly and which one could still be problematic?[email protected]:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Botic [Botic], device 0: external botic-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
[email protected]:~$ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=Botic
Botic,
Default Audio Device
sysdefault:CARD=Botic
Botic,
Default Audio Device
dmix:CARD=Botic,DEV=0
Botic,
Direct sample mixing device
dsnoop:CARD=Botic,DEV=0
Botic,
Direct sample snooping device
hw:CARD=Botic,DEV=0
Botic,
Direct hardware device without any conversions
plughw:CARD=Botic,DEV=0
Botic,
Hardware device with all software conversions
[email protected]:~$ speaker-test
speaker-test 1.1.3
Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 16 to 786432
Period size range from 8 to 393216
Using max buffer size 786432
Periods = 4
was set period_size = 196608
was set buffer_size = 786432
0 - Front Left
Time per period = 10.378743
0 - Front Left
Time per period = 10.239861
0 - Front Left
Time per period = 10.239897
0 - Front Left
Time per period = 10.239885
0 - Front Left
Time per period = 10.239877
0 - Front Left
Time per period = 10.239869
0 - Front Left
Time per period = 10.239883
0 - Front Left
Time per period = 10.239875
While letting speaker-test run I could not identify an output signal with a multimeter set to mV and AC. At the input header I could only detect a signal of 1,6V AC at pin 9 for the "MCK_IN", but not for "DCK_OUT", "D1_OUT", or "D2_OUT" (see attached picture). Also of 3,4V DC at pin 10 and 20.
Q2: Shouldn't I measure a signal at the inputs for "DCK_OUT", "D1_OUT", or "D2_OUT"?
Q3: What could be the reason for just getting a signal at "MCK_IN"?
Q4: Is there any measurement I could do for finding the problem?
As always I attached some picture in the hope that someone spots a stupid mistake