I still haven't started my TDA1541A project.
For now I'm going to stick with EIAJ as I don't have any other sources. Can I get this clock signal from a CDP? I don't know the controller chip for one if the CDPs but one is using CXD2500.
What I'm planning is:
- Pedja's DAC scheme with TNT1541 PSUs
- cm's EIAJ to I2S converter
- Pass D1 I/V stage
- DEM circuit
A KC will replace the one in the CDP
Future things I might add :
- PCM2706 USB to I2S
- CS8414 SPDIF to I2S
For now I'm going to stick with EIAJ as I don't have any other sources. Can I get this clock signal from a CDP? I don't know the controller chip for one if the CDPs but one is using CXD2500.
What I'm planning is:
- Pedja's DAC scheme with TNT1541 PSUs
- cm's EIAJ to I2S converter
- Pass D1 I/V stage
- DEM circuit
A KC will replace the one in the CDP
Future things I might add :
- PCM2706 USB to I2S
- CS8414 SPDIF to I2S
If you mean that the dac and the cd player have a different clock:
yes it matters! they will not have exactly the same clock value, so one will be faster than the other. You will run into timing problems.
Without a 8414 reciever in the correct mode this will not work (and in this mode you will loose/double samples, depending on who's faster). But then you're stuck to spdif.
If you mean that the dac/player and dem reclocking have a different clock: yes it should matter: dem reclocking is to get the dem freq a multiple of the samplefreq (which is determined by the clock). If it is a different clock, this will not be the case (though better than the original dem oscillator freq i guess).
yes it matters! they will not have exactly the same clock value, so one will be faster than the other. You will run into timing problems.
Without a 8414 reciever in the correct mode this will not work (and in this mode you will loose/double samples, depending on who's faster). But then you're stuck to spdif.
If you mean that the dac/player and dem reclocking have a different clock: yes it should matter: dem reclocking is to get the dem freq a multiple of the samplefreq (which is determined by the clock). If it is a different clock, this will not be the case (though better than the original dem oscillator freq i guess).
.......when I see an elephant fly
This is the kind of thing that crushes even the strongest and in a flash they've given in to the darkside and become apprenticed to Darth Ulas.
Read the datasheet. It is not a serving suggestion. It is fundamental to workings the TDA1541A. A basic understanding of the TDA1541A is an absolute prerequisite for any advice you receive here to make sense.
In short, NO!, there is no internal oversampling, that is what the SAA7220 and its like are for.
DragonMaster said:
This is the kind of thing that crushes even the strongest and in a flash they've given in to the darkside and become apprenticed to Darth Ulas.
Read the datasheet. It is not a serving suggestion. It is fundamental to workings the TDA1541A. A basic understanding of the TDA1541A is an absolute prerequisite for any advice you receive here to make sense.
In short, NO!, there is no internal oversampling, that is what the SAA7220 and its like are for.
I did, and the first time was a long time ago. It's this:
and the fact that TNT uses decimation that messed me up.
So: My CXD2500 outputs a 48-bit EIAJ signal, then there's a digital filter that converts it to 16-bit I suppose, and then there's the DAC. I have no idea if the DF oversamples or if it's the DAC.
Elso, you worked with this chip, what can I do?
Hi all,
I had one silly question & hope to collect some informations.
I was designed for my ver.3 1541a dac. Is anybody can advise that I choose AD1890 ( SamplePort Stereo Asynchronous Sample Rate Converters ) with 16Mhz TCXO will be better choose as use standard re-clock????
Looks AD1890 with TCXO can make sure the purity & the accurancy of the pure 16bits data steam also function well.
pls advise!
thx
thomas
I had one silly question & hope to collect some informations.
I was designed for my ver.3 1541a dac. Is anybody can advise that I choose AD1890 ( SamplePort Stereo Asynchronous Sample Rate Converters ) with 16Mhz TCXO will be better choose as use standard re-clock????
Looks AD1890 with TCXO can make sure the purity & the accurancy of the pure 16bits data steam also function well.
pls advise!
thx
thomas
DragonMaster said:
Hi,
Study Horowitz and Hill, The Art of Electronics? Before you ask, that's a book.
Google?
http://www.audioholics.com/techtips/specsformats/upsamplingvsoversampling1.php