03-05-2022, 12:20 AM
from the OP we have
and similarly it plays here on an RPi Zero 2 W with a (USB) Creative BT-W2 adapter so I'm thinking we've already demonstrated the problem is in the PecanPi DAC / driver.
Time for a discussion with the Orchard Audio folks. They're long on audiophilic marketing quotes but short on useful technical details.
Yeah, "up to..." but what is the lowest sampling rate (which depends on the clock rates the board supports, or v.v.)? The driver claims 8 kHz to 384 kHz. That seems to exceed what I read on the TI datasheet for just the PCM1794A DAC chip (10 kHz to 200 kHz) but, whatever it is, they should be definite in the specs given for the board.
Um, that's not a bit rate, it's a bit depth, and "Up to..." isn't enough. What bit depths, precisely? The driver claims 16-bit and 24-bit. Given the TI DAC chip used, this sounds right but they should say so in the specs for the board.
Regards,
Kent
Quote:It WILL play on the Rasberry Pi Zero W with Allo MiniBoss DAC
and similarly it plays here on an RPi Zero 2 W with a (USB) Creative BT-W2 adapter so I'm thinking we've already demonstrated the problem is in the PecanPi DAC / driver.
Time for a discussion with the Orchard Audio folks. They're long on audiophilic marketing quotes but short on useful technical details.
Quote:Sampling Rates: PCM up to 192kHz
Yeah, "up to..." but what is the lowest sampling rate (which depends on the clock rates the board supports, or v.v.)? The driver claims 8 kHz to 384 kHz. That seems to exceed what I read on the TI datasheet for just the PCM1794A DAC chip (10 kHz to 200 kHz) but, whatever it is, they should be definite in the specs given for the board.
Quote:Bit Rates: Up to 24-bit
Um, that's not a bit rate, it's a bit depth, and "Up to..." isn't enough. What bit depths, precisely? The driver claims 16-bit and 24-bit. Given the TI DAC chip used, this sounds right but they should say so in the specs for the board.
Regards,
Kent
