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Recording audio from SPDIF with the DAC+ DSP | HiFiBerry
https://www.hifiberry.com/blog/recording-audio-from-spdif-with-the-dac-dsp/
This shows how to configure the DSP on the DAC+ DSP board to send S/PDIF audio to the Raspberry Pi instead of routing it to the analog output. …
Using the DAC+ DSP to record audio from S/PDIF | HiFiBerry
https://www.hifiberry.com/docs/software/using-the-dac-dsp-to-record-audio-from-s-pdif/
Using the DAC+ DSP to record audio from S/PDIF The DAC+ DSP can also be used to send data from the DSP back to the Pi. One use case is to record audio from S/PDIF input. As our DSP profiles are optimised for playback, this requires some configurations. Configure the DAC+ DSP driver with recording capabilities
Parks Audio
http://www.parksaudiollc.com/spdif/spdif.html
DIY SPDIF Mod Instructions for Parks Audio Puffin Phono DSP 2/28/2021 SP Overview The standard Puffin preamp only has analog inputs and outputs. Some users have requested a digital output in order to use their own external DAC. This mod adds an RCA coaxial output with which bypasses the Puffin's internal DAC.
freeDSP | An Open-Source Low-Budget Audio DSP
https://freedsp.github.io/
Optical/SPDIF Input to DSP, What's the Input "voltage ...
https://www.diymobileaudio.com/threads/optical-spdif-input-to-dsp-whats-the-input-voltage.443978/
In digital audio, the analog audio signal is converted to a digital number that represents the value of the voltage level of the analog signal voltage. This... www.minidsp.com Click to expand... Thanks for the link, I'll take a look. i assume that the digital signal is just 0s and 1s, with no absolute amplitude (?).
Adding post-DSP SPDIF outputs to AVRs | Audio Science ...
https://www.audiosciencereview.com/forum/index.php?threads/adding-post-dsp-spdif-outputs-to-avrs.19468/
The SPDIF outputs are fixed level with regard to master volume, so the downstream DAC (s) requires volume control. I use a PGA4311UA for this purpose, as it is highly linear, readily available and offers four channels. Ideal for 2.1 or 2.2 configurations, if you'd rather not control volume via the source.
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