Hi,
I'm trying to connect my Raspberry Pi i2s directly to my DAC board. I have a few options, if I understand it correctly:
1. USB - the board supports - sounds o.k.
2. SPIDIF - also supported - sound much better
3. NOS with the TDA1541 - haven't test it yet, but I guess I know how to do it. By the way, this kind of connection to ProtoDac sounds very very good to my ears, after reducing the Vin of the ProtoDac to 4.3V and feed it with separated linear power supply...
Now, I can't find out how to connect the SAA7220P/B to i2s. I fail to match the i2s output to the correct pins of the SAA7220P/B. Any support in mapping, or saying what am I doing wrong will be highly appreciated!
Thank,
Jacob
I'm trying to connect my Raspberry Pi i2s directly to my DAC board. I have a few options, if I understand it correctly:
1. USB - the board supports - sounds o.k.
2. SPIDIF - also supported - sound much better
3. NOS with the TDA1541 - haven't test it yet, but I guess I know how to do it. By the way, this kind of connection to ProtoDac sounds very very good to my ears, after reducing the Vin of the ProtoDac to 4.3V and feed it with separated linear power supply...
Now, I can't find out how to connect the SAA7220P/B to i2s. I fail to match the i2s output to the correct pins of the SAA7220P/B. Any support in mapping, or saying what am I doing wrong will be highly appreciated!
Thank,
Jacob
Sure. The first think I did - here. But I couldn't map the three i2s to the correct pinout as the names are not the same. ChatGPT suggested something completely wrong... I mean, I need to connect the BCK / WS / DATA. Is it possible at all? Can't find these in the datasheet. I assume that pin 1 is the WS, but then I'm lost. Thanks!
Correct, pin 1 is WSAB (AB means from A-chip to B-chip, that is from SAA7210 to SAA7220), pin 2 is CLAB that is bit clock (or BCK) and pin 3 is DAAB that is data (or SD, SDA).
Hi, thank you so much! I'll test it soon. Just need to make sure that I will disconnect the original feed to this cheep on the board.
Not sure what will sound better - NOS or with oversampling...
Not sure what will sound better - NOS or with oversampling...
Connection works just great when I bypass the SAA7220 (that is, NOS). It sounds a little "thin" to my ears. Now, when I plug the SAA7220 back, it simply does not work! No sound from the DAC. I looked at the pinout and my only suspect are pins 23 (mute) when Low. Does it mean that I should disconnect it in case the board send a signal there from some reason? Thanks.
Do you have a schematic? Does the RPi emit an MCLK? In my understanding SAA7220 generates its own MCLK from a crystal but here I would guess you need an MCLK in sync with the other I2S signals.