Add a DAC to a cheap CD player?
 

On Tue, 09 Dec 2003 20:00:26 -0500
Kalman Rubinson wrote:

To say nothing of the probable need for a step-down power transformer.

Actually a LOT of modern equipment uses SMPSUs, which are (these days)
designed to run between 90 and 250V typically, and so will work fine
wherever...

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with
ketchup.

Add a DAC to a cheap CD player?
 

malcolm wrote:

Silver-fronted jobbie. Asda were flogging them for £100 a few months
ago. Last seen at 70 quid before disappearing.

Wal-Mart sell Apex ones for 45 dollars or so, would be about 30 quid
in the UK.
and post Thanks-giving day sale they were $29.95 for a morning.
they have one playing movies on a TV and quite good pic quality.
silly prices now, don't know what the postage would be from the USA
to the UK,
and whether the customs would slap import duty on one.

I already have a player - I'm looking into improving it with a DAC.


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)

Add a DAC to a cheap CD player?
 

malcolm wrote:

Silver-fronted jobbie. Asda were flogging them for £100 a few months
ago. Last seen at 70 quid before disappearing.

Wal-Mart sell Apex ones for 45 dollars or so, would be about 30 quid
in the UK.
and post Thanks-giving day sale they were $29.95 for a morning.
they have one playing movies on a TV and quite good pic quality.
silly prices now, don't know what the postage would be from the USA
to the UK,
and whether the customs would slap import duty on one.

I already have a player - I'm looking into improving it with a DAC.


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)

Add a DAC to a cheap CD player?
 

Ian Molton wrote:

With the 'async' SPDIF you will hear every bit correctly (and thats
still dependant on the conversion method). with a reclocked output,
given the clock will NEVER be a perfect match for the SPDIF clock
anyway, you are garaunteed to either drop or stretch a whole bit at
some point. ick.

So, what's the difference between async and reclocked? If reclocking is
about feeding back time adjustment info from DAC to transport, does
asynchronus mean there's some sort of buffering in the DAC?


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)

Add a DAC to a cheap CD player?
 

Ian Molton wrote:

With the 'async' SPDIF you will hear every bit correctly (and thats
still dependant on the conversion method). with a reclocked output,
given the clock will NEVER be a perfect match for the SPDIF clock
anyway, you are garaunteed to either drop or stretch a whole bit at
some point. ick.

So, what's the difference between async and reclocked? If reclocking is
about feeding back time adjustment info from DAC to transport, does
asynchronus mean there's some sort of buffering in the DAC?


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)

Add a DAC to a cheap CD player?
 

On Wed, 10 Dec 2003 01:15:00 GMT
"Wally" wrote:


So, what's the difference between async and reclocked? If reclocking is
about feeding back time adjustment info from DAC to transport, does
asynchronus mean there's some sort of buffering in the DAC?

thats not reality, sorry.

the 'reclocked' signal is simply one that has been resynchronised to another clock, with bits added / discarded to suit the difference in clock speed between the spdif clock and the reference one.

neither this or what I called 'async' above has any feedback at all.

Given the choice, I'd go for the lesser of two evils - the raw, unadulterated signal.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

Add a DAC to a cheap CD player?
 

On Wed, 10 Dec 2003 01:15:00 GMT
"Wally" wrote:


So, what's the difference between async and reclocked? If reclocking is
about feeding back time adjustment info from DAC to transport, does
asynchronus mean there's some sort of buffering in the DAC?

thats not reality, sorry.

the 'reclocked' signal is simply one that has been resynchronised to another clock, with bits added / discarded to suit the difference in clock speed between the spdif clock and the reference one.

neither this or what I called 'async' above has any feedback at all.

Given the choice, I'd go for the lesser of two evils - the raw, unadulterated signal.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

Add a DAC to a cheap CD player?
 

On Wed, 10 Dec 2003 02:12:49 +0000, Ian Molton wrote:

On Wed, 10 Dec 2003 01:15:00 GMT
"Wally" wrote:


So, what's the difference between async and reclocked? If reclocking is
about feeding back time adjustment info from DAC to transport, does
asynchronus mean there's some sort of buffering in the DAC?

thats not reality, sorry.

the 'reclocked' signal is simply one that has been resynchronised to
another clock, with bits added / discarded to suit the difference in
clock speed between the spdif clock and the reference one.

I wonder - would the DAC ensure the discarded bits are the least
significent ones?
If so wouldn't the worst reclocking can do just lower the resolution from
16 to 15
bits for 1/44000 of a second?

To minimise this effect components should be placed side by side, not
stacked.
Most hi-end gear was not designed to handle the effects of relitivity.

--
Jim H jh
@333
.org

Add a DAC to a cheap CD player?
 

On Wed, 10 Dec 2003 02:12:49 +0000, Ian Molton wrote:

On Wed, 10 Dec 2003 01:15:00 GMT
"Wally" wrote:


So, what's the difference between async and reclocked? If reclocking is
about feeding back time adjustment info from DAC to transport, does
asynchronus mean there's some sort of buffering in the DAC?

thats not reality, sorry.

the 'reclocked' signal is simply one that has been resynchronised to
another clock, with bits added / discarded to suit the difference in
clock speed between the spdif clock and the reference one.

I wonder - would the DAC ensure the discarded bits are the least
significent ones?
If so wouldn't the worst reclocking can do just lower the resolution from
16 to 15
bits for 1/44000 of a second?

To minimise this effect components should be placed side by side, not
stacked.
Most hi-end gear was not designed to handle the effects of relitivity.

--
Jim H jh
@333
.org

Add a DAC to a cheap CD player?
 

"Wally" wrote in message
...
malcolm wrote:

Silver-fronted jobbie. Asda were flogging them for £100 a few months
ago. Last seen at 70 quid before disappearing.

Wal-Mart sell Apex ones for 45 dollars or so, would be about 30 quid
in the UK.
and post Thanks-giving day sale they were $29.95 for a morning.
they have one playing movies on a TV and quite good pic quality.
silly prices now, don't know what the postage would be from the USA
to the UK,
and whether the customs would slap import duty on one.

I already have a player - I'm looking into improving it with a DAC.


--
Wally
www.art-gallery.myby.co.uk
Latest work: The Langlois Bridge (after Van Gogh)




just comparing price differences etc