spdif?

orange · 19 April 2011, 21:22

just a thought. has anyone tried making audio spdif out (coax or optic) for Amiga? seems to me that hi-fi equipment is moving toward spdif. people use more and more PC with hdd instead of CD player. it would be nice to have Amiga connect directly to some hi-fi DAC. then there would be no more difference in sound quality with PC.

thomas · 19 April 2011, 21:55

Quote:

then there would be no more difference in sound quality with PC.

Really? Amiga outputs 8 bit samples at 28 kHz max and PC does 16 bit samples at 48 kHz (cheapest sound card; more expensive cards do even more).

Reynolds · 19 April 2011, 23:04

Okay, then whats up with the Amiga soundcards with SPDIF port? There are some IIRC.

thgill · 20 April 2011, 00:21

Quote:

Originally Posted by Reynolds

Okay, then whats up with the Amiga soundcards with SPDIF port? There are some IIRC.

thomas is referring to the stock audio via Paula and not an add on sound card.

prowler · 20 April 2011, 00:26

Quote:

Originally Posted by thgill

Quote:

Originally Posted by Reynolds

Okay, then whats up with the Amiga soundcards with SPDIF port? There are some IIRC.

thomas is referring to the stock audio via Paula and not an add on sound card.

Surely Reynolds' question is directed not at thomas, but at orange?

(Though admittedly it's difficult to tell without a quote.

)

orange · 20 April 2011, 08:13

@thomas

I was referring to playing mp3 or flac. since spdif is digital, it should be possible to bypass Paula. just convert it somehow. like those external mp3 decoders. they don't use Paula, right?

thomas · 20 April 2011, 08:21

Then Reynolds' post answers your question, doesn't it? He says that there are sound cards for Amiga with SPDIF output. But that's not Amiga in its narrow meaning. A sound card in an Amiga is the same as a sound card in a PC. You don't need an Amiga to have a sound card.

orange · 20 April 2011, 08:53

hm, yes. he didn't name any, though.
but what is Amiga in 'narrow meaning'? what about RTG, perhaps that's not Amiga either.

spdif out that I wish would mix Paula output with HQ audio. similar to HDMI (mentioned here) using digital signals from Alice and combining it with, say, RTG output.

Loedown · 20 April 2011, 11:54

Quote:

Originally Posted by orange

hm, yes. he didn't name any, though.
but what is Amiga in 'narrow meaning'? what about RTG, perhaps that's not Amiga either.

spdif out that I wish would mix Paula output with HQ audio. similar to HDMI (mentioned here) using digital signals from Alice and combining it with, say, RTG output.

You could make the sound 192KHz @ 32 bit, it would still not quite as good as the original output 8 bit sample. PC is only limited by the hardware you're willing to spend the cash on, mine does 96KHz at 24 bit for example at 3ms latency.

Reynolds · 20 April 2011, 18:44

Quote:

Originally Posted by prowler

Surely Reynolds' question is directed not at thomas, but at orange?

(Though admittedly it's difficult to tell without a quote.

)

Exactly

pandy71 · 21 April 2011, 18:20

All You need is capture data from Paula, convert them to constant speed and transmit by S/PDIF - constant speed can be achieved by using none of many available ASRC.

http://www.analog.com/en/audiovideo-...s/product.html
http://focus.ti.com/docs/prod/folder...t/src4194.html

or use decent audio ADC, convert analog signal from Paula to digital and with one of S/PDIF transmiters send digital audio

19 April 2011, 21:22	#1
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	spdif? just a thought. has anyone tried making audio spdif out (coax or optic) for Amiga? seems to me that hi-fi equipment is moving toward spdif. people use more and more PC with hdd instead of CD player. it would be nice to have Amiga connect directly to some hi-fi DAC. then there would be no more difference in sound quality with PC.

19 April 2011, 23:04	#3
Reynolds Alien Breeder Join Date: Dec 2007 Location: Szigetszentmiklos / Hungary Age: 46 Posts: 1,096	Okay, then whats up with the Amiga soundcards with SPDIF port? There are some IIRC.

20 April 2011, 08:13	#6
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	@thomas I was referring to playing mp3 or flac. since spdif is digital, it should be possible to bypass Paula. just convert it somehow. like those external mp3 decoders. they don't use Paula, right?

20 April 2011, 08:21	#7
thomas Registered User Join Date: Jan 2002 Location: Germany Posts: 6,985	Then Reynolds' post answers your question, doesn't it? He says that there are sound cards for Amiga with SPDIF output. But that's not Amiga in its narrow meaning. A sound card in an Amiga is the same as a sound card in a PC. You don't need an Amiga to have a sound card.

20 April 2011, 08:53	#8
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	hm, yes. he didn't name any, though. but what is Amiga in 'narrow meaning'? what about RTG, perhaps that's not Amiga either. spdif out that I wish would mix Paula output with HQ audio. similar to HDMI (mentioned here) using digital signals from Alice and combining it with, say, RTG output.

21 April 2011, 18:20	#11
pandy71 Registered User Join Date: Jun 2010 Location: PL? Posts: 2,741	All You need is capture data from Paula, convert them to constant speed and transmit by S/PDIF - constant speed can be achieved by using none of many available ASRC. http://www.analog.com/en/audiovideo-...s/product.html http://focus.ti.com/docs/prod/folder...t/src4194.html or use decent audio ADC, convert analog signal from Paula to digital and with one of S/PDIF transmiters send digital audio

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