Hi Forum,
I build a DAC with dual PCM56P after i read the PCM56 data sheet, still i do not understand how to make it one for left and one for right. From CS8412 i need to use mode 5. Should i paralell them or do i need something to make them into left and right?. I prefer to run on battery.
please give some direction that would help. thanks.
Cheer,
Van Hai
I build a DAC with dual PCM56P after i read the PCM56 data sheet, still i do not understand how to make it one for left and one for right. From CS8412 i need to use mode 5. Should i paralell them or do i need something to make them into left and right?. I prefer to run on battery.
please give some direction that would help. thanks.
Cheer,
Van Hai
Thank rfbrw,
can i use SM5807EP? I have that chip but i need to search the data for it to know the pin in and out. Does any one have the data sheet?
regards,
Van Hai
can i use SM5807EP? I have that chip but i need to search the data for it to know the pin in and out. Does any one have the data sheet?
regards,
Van Hai
If it is a digital filter then probably. I can't give a definite reply as I don't have the datasheet.
Jean-Paul, thanks hope u can help, i've been search the net but no where to be found.
cdm9, the link seem do not work but thank you anyway.
Van Hai
cdm9, the link seem do not work but thank you anyway.
Van Hai
cdm9 said:
Be aware that if you connect the PCM56 in this manner you will have a delay between the dacs. It will be like the early CD players that only had one dac.
Konnichiwa,
And be also aware that the delay will be 22.7uS. In that time sound travels approximatly 7.8mm. So if you wish to avoid the delay simply position your head such that the speaker which receives the non-delayed signal is 7.8mm further away from your head than the other speaker.
This of course assumes that you reliably position your speakers and your head for listening to within a reasonably small fraction of 1mm, if you don't and you fail to hold sufficiently still when listening I suspect the whole argument is moderatly academic.
Sayonara
rfbrw said:
And be also aware that the delay will be 22.7uS. In that time sound travels approximatly 7.8mm. So if you wish to avoid the delay simply position your head such that the speaker which receives the non-delayed signal is 7.8mm further away from your head than the other speaker.
This of course assumes that you reliably position your speakers and your head for listening to within a reasonably small fraction of 1mm, if you don't and you fail to hold sufficiently still when listening I suspect the whole argument is moderatly academic.
Sayonara
Kuei Yang Wang said:
One either thinks this kind of thing matters or it does not, bit like mono and stereo subwoofers. Me,I'd rather not have the delay.
Can i try this to get rid of delay like one chanel to 74HC86D, the other 74HC00P that for WS from SM5807EP, the other two will be paralell throught a resister will that work?
Cheer.
Cheer.
Konnichiwa,
I also rather NOT have the delay, on principle.
BUT, from experience, it does not MATTER. What matters is that teh much more complex circuitry to eliminate the delay causes much more audible degradation, from my experience than the 7.8mm virtual displacement, which in fact I have yet to be able to identify at all with any reliability.
Sayonara
rfbrw said:
I also rather NOT have the delay, on principle.
BUT, from experience, it does not MATTER. What matters is that teh much more complex circuitry to eliminate the delay causes much more audible degradation, from my experience than the 7.8mm virtual displacement, which in fact I have yet to be able to identify at all with any reliability.
Sayonara
Haven't try out by myself, but it might be possible to do it this way:
On the driver side, use two BB DIT4096 in dual mono mode;
so u get two SPDIF output, 1L, 1R;
On the receiver side, use two CS8414, one for each channel;
then feed FSYNK to LE and SCK to CLK directly.
No glue logic, no stop clock is need. And u still got no inter-channel delay.
Any commend?
On the driver side, use two BB DIT4096 in dual mono mode;
so u get two SPDIF output, 1L, 1R;
On the receiver side, use two CS8414, one for each channel;
then feed FSYNK to LE and SCK to CLK directly.
No glue logic, no stop clock is need. And u still got no inter-channel delay.
Any commend?
banana said:
No glue logic !!!! Logic is logic glue or otherwise. And with two SPDIF transmitters and three SPDIF receivers you have quite a bit of it.
To quote a tennis player of the last century "You cannot be serious".
I'm glad we have you around.....
I tend to get reminders from the moderators when I point out the obvious................
Mr. Personality
I tend to get reminders from the moderators when I point out the obvious................
Mr. Personality
Konnichiwa,
I tried the basic circuit from that DAC (inverted LE) first on my PCM63 DAC. I later tried other approaches and non sounded as direct and detailed as the original. In the end I liked the TDA1541 even better sonically, but that is another story.
Sayonara
rfbrw said:
I tried the basic circuit from that DAC (inverted LE) first on my PCM63 DAC. I later tried other approaches and non sounded as direct and detailed as the original. In the end I liked the TDA1541 even better sonically, but that is another story.
Sayonara
Can We have a small circuit like sample and hold with time control for one channel, so the two channel will be match at the output. Can this work?.
In audio we want to pursuit excell in simple way that need a lot sophiticated thought.
Cheer
In audio we want to pursuit excell in simple way that need a lot sophiticated thought.
Cheer
You can have anything you want if you can find someone to design or build it but since the data is already in the digital domain why not manipulate it in the digital domain. Dacs like the PCM56 allow you to load data, stop the clock, hang around, start the clock and then convert the data , so why not take advantage of it.
- Status
- Not open for further replies.