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SRC hat for Raspberry Pi
SRC hat for Raspberry Pi
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Old 30th August 2018, 08:41 PM   #1
DRONE7 is offline DRONE7  New Zealand
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Join Date: Aug 2008
Default SRC hat for Raspberry Pi

Interesting addition.. a hat that does src and up-sampling to dsd options.
Raspi-4137 Raspberry Pi Digital Network Player Supports 32bit 384K DSD256 | eBay

There have been discussions in this thread as to the advantages of feeding ESS90xx dacs with dsd data.
ES9038Q2M Board

This board does on the fly conversion so no need to store huge files and i2s output so no usb to i2s needed.
Uses hifiberry driver.. I'm guessing sda/scl gpio used so may curtail other i2c devices such as displays ?

Alternative stand alone version...
AK4137 I2S/DSD Sample Rate Conversion Board Supports PCM/DSD Interconversion DOP | eBay
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Old 26th March 2019, 02:59 PM   #2
dezo is offline dezo
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Join Date: Feb 2016
Location: SK
Hi,is this board something similar to Allo Kali?Does it improve I2S signal from RPi?
I would like to use it as a source for my Mamboberry DAC.Is it possible?
Thanks.
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Old 26th March 2019, 06:46 PM   #3
DRONE7 is offline DRONE7  New Zealand
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Join Date: Aug 2008
This board is a Sample Rate Converter...it re-samples (up-samples) to your chosen sample rate.
The benefits seem to be most noticeable when the output ie resampled is DSD 256... if your DAC does not accept this then it will be of little use.

The Kali is a reclocker. It fixes the RPi's clocking inadequacy.

I have both and prefer the Kali for sound quality... It also currently has an incompatibility with the Linux kernel requiring a workaround for 24 bit sample rates.
It seems this may be fixed for newer kernels.
It does not work with DSD files.

Depending on your playback format needs this may affect your choice.

Last edited by DRONE7; 26th March 2019 at 07:06 PM.
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