Hi,
the Hermes-RPi Isolator Module came today.
What do the N0/N1/N2/CS leds indicate?
IC4 is not populated, what is the intended use?
What is W_EN for?
There are inputs for GND & 5V
should they be connected to a 5V ps?
Will this board work without the Miro updates
to the RPi software?
Thanks for any info!
ICHIBAN
the Hermes-RPi Isolator Module came today.
What do the N0/N1/N2/CS leds indicate?
IC4 is not populated, what is the intended use?
What is W_EN for?
There are inputs for GND & 5V
should they be connected to a 5V ps?
Will this board work without the Miro updates
to the RPi software?
Thanks for any info!
ICHIBAN
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The 5 V connector pins are connected to the 5v power supply of the RPi.
You don't need it if you power the Raspberry Pi the usual way (usb plug)
The Hermes-RPi uses the RPi integrated power (from 40 pin connector) for the dirty side, and receives the clean 3.3V from the Cronus board.
You don't need it if you power the Raspberry Pi the usual way (usb plug)
The Hermes-RPi uses the RPi integrated power (from 40 pin connector) for the dirty side, and receives the clean 3.3V from the Cronus board.
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They reflect the sampling rate of the music playing
CS is Clock Select, 0 for 44.1kHz clock family, 1 for 48 kHz family
With the other Nx leds, it says which samplerate you use between
44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000
Don't know, sorry
Nope, you need the dedicated overlay
Code:
Hz | N0 | N1 | N2 | CS
44100 | 0 | 1 | 1 | 0
48000 | 0 | 1 | 1 | 1
88200 | 1 | 1 | 0 | 0
96000 | 1 | 1 | 0 | 1
176400 | 1 | 0 | 0 | 0
192000 | 1 | 0 | 0 | 1
352800 | 0 | 0 | 0 | 0
384000 | 0 | 0 | 0 | 1hi,
if you are asking me, I cannot say.
I have not tried any of the LINUX
distros. I would like to, but I dread
having to dittle around with the
commands etc.
I recall someone posting some
help to get a LINUX version
for RPI and how to add BOTIC
but I cannot remember
where that was and my searching
various related threads on TPs forum
has come up with nothing.
Maybe when I'm feeling better
I'll try to find where that was located.
Sorry
if you are asking me, I cannot say.
I have not tried any of the LINUX
distros. I would like to, but I dread
having to dittle around with the
commands etc.
I recall someone posting some
help to get a LINUX version
for RPI and how to add BOTIC
but I cannot remember
where that was and my searching
various related threads on TPs forum
has come up with nothing.
Maybe when I'm feeling better
I'll try to find where that was located.
Sorry
Hi Miero,
got it (somewhat working) with actual DietPi (Allo GUI ARMv7 image : This image has our Allo web GUI and audiophile software pre-installed)
had to upgrade kernel first: (apt upgrade) because of mismatch off kernel and kernel-headers
than had to change one of you steps (for DietPi):
echo "dtoverlay=tpa-hermes-rpi" >> /DietPi/config.txt
/DietPi/dietpi/func/dietpi-set_hardware soundcard hw:sndtpahermesrpi,0
to
echo "dtoverlay=tpa-hermes-rpi" >> /boot/config.txt
/boot/dietpi/func/dietpi-set_hardware soundcard hw:sndtpahermesrpi,0
Now I can use Roon to play music.
Branko
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So it is ok Roon shows no native dsd option. Thought it was a configuration fault.
Roon give me the "Device Setup":
max sample rate (PCM)--> 384kHz
max sample rate (DSD)--> Up to DSD128
But B3pro is capable of more?
Also when playing DSD --> DoP the is no LED lit on RPi-Hermes. only if playing PCM files?
thx
Branko
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Hi all
I wanted to run librespot for spotify connect but ran into issues with the driver and alsa backend.
Running mpd on dietpi allo, playback seems to work fine but outputs error:
Has anyone else encountered problems with alsa?
I wanted to run librespot for spotify connect but ran into issues with the driver and alsa backend.
Running mpd on dietpi allo, playback seems to work fine but outputs error:
I have opened an issue Error writing from AlsaSink buffer to PCM * Issue #2 * miero/tpa-hermes-rpi-dev * GitHub while working on the problem.
Has anyone else encountered problems with alsa?
Not using your system (so can't be very useful), but suggest you look at the output section of /etc/mpd.conf. Is the output directed to a destination (possibly dmix?) that is not listed by 'aplay -l'? I would guess that 'hw:1,0' would be preferred. Be sure that the MPD output destination is something listed by 'aplay -l'.
Is this because of the available gpio on rpi? Im thinking if perhaps the rpi cm4 could provide the required gpios?
My understanding is that the device tree of the RPi - whether the compute module or any other version - only supports one (stereo) I2S stream. In contrast, the TI AM 3358 used on the BBB has two McASP hardware cores that each allow synchronous processing of two (stereo) I2S streams (8 channels total) or up to 4 synchronized DSD streams. The Broadcom CPU in the RPi doesn't have this serial processing functionality. If it could create multichannel serial audio output, there would be sufficient GPIO channels among the 40 pins. Apparently, the only way to output multichannel audio from the RPi is via HDMI.
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