Digital to Analogue converter
Digital to Analogue converter
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Discussion

quigonjay

Original Poster:

1,673 posts

247 months

Sunday 24th May
quotequote all
Hi, looking for the above so I can connect my newish TV to my older surround sound Technics stereo, it is currently connected through the headphone socket but obviously I do not get surround sound through this method. Had a look on Ebay and there are plenty available from around £7 upwards, perfect, thing is, they all seem to be USB powered which would not normally be a problem as the TV does have a single USB but I need the USB socket to remain free, there are one or two which have a power supply but second hand. With the USB powered ones would I be able to use one of the many older 5v power supplies I seem to have lying around from older/unused devices?

Mr Pointy

13,158 posts

185 months

Sunday 24th May
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If the PSU has a USB connector on it then it will work.

quigonjay

Original Poster:

1,673 posts

247 months

Sunday 24th May
quotequote all
So any USB plug should work? something like this?

USB plug

miniman

29,699 posts

288 months

Sunday 24th May
quotequote all
quigonjay said:
So any USB plug should work? something like this?

USB plug
Yep. Depending on the current requirement you might find one of these will power it from the TV along with whatever else you connect.




quigonjay

Original Poster:

1,673 posts

247 months

Sunday 24th May
quotequote all
miniman said:
Yep. Depending on the current requirement you might find one of these will power it from the TV along with whatever else you connect.



Ah, never thought of that, would be better actually, not that specific model but seem to be available for about £2 so about that same as the plug but less hassle

quigonjay

Original Poster:

1,673 posts

247 months

Sunday 24th May
quotequote all
So there seems to be two main types of converter that would be suitable for what I want

This type

and this type with the built in RCA connection

t'other type

don't really know anything about this kind of thing, is there any reason why one is better than the other?

OldGermanHeaps

5,047 posts

204 months

Sunday 24th May
quotequote all
The optical converter means you will lose the ability to change the volume from the tv remote that you currently have using the headphone socket.
Hdmi arc to analogue converters retain the volume control, but most of the ebay/amazon ones I have come across fail in a relatively short period of time, and I have seen a couple fail in a way that damaged the hdmi arc port on the tv.
I have used more expensive converters from eurosat,alltrade and netceed/comtec that look very similar to the amazon ones, but none of them have failed so far and its been a few years now.


EDIT hang on,i just reread your OP
The answer i gave before was relating to the converters you shown in the later post.
None of these will give you surround sound.
The only way is a digital to digital connection direct to your amp and outputting in a format it can decode, or if it has multi channel 5.1 or 7.1 analogue inputs and you can fit an optical, coaxial spdif or hdmi arc to multichannel analogue line level converter.

Being technics its probably older, it might not support arc,its probably toslink or coaxial spdif. What inputs does it have, what outputs does the telly have,and it it possible to run new cables between?

Edited by OldGermanHeaps on Sunday 24th May 21:24

quigonjay

Original Poster:

1,673 posts

247 months

Sunday 24th May
quotequote all
Yes 5.1, will be from the SPDIF, it is an older stereo (maybe 25 years old) but still works well with very good quality sound, pretty sure it does not have digital audio input

EDIT: just to add, surround used to work very well from game consoles and from my old TV that had RCA output, did not think it could be done with new TV until yesterday when I noticed the SPDIF socket on my TV and wondered what it was, had never heard of it before

Edited by quigonjay on Sunday 24th May 21:41

OldGermanHeaps

5,047 posts

204 months

Sunday 24th May
quotequote all
You need to clarify, what spdif?
Do you mean the tv has sdpif out or the amp has spdif in.
Neither of those converters has spdif out. One has a misprint, but thats par for the course for chinese scammers.
Does the amp have optical in?
You dont get surround sound from 2 rca.
Did.you maybe have pseudosurround enabled on the amp when you used your old console?
Why not share pics of the front and back of the amp, and the connections on the tv?


Edited by OldGermanHeaps on Sunday 24th May 22:15

quigonjay

Original Poster:

1,673 posts

247 months

Monday 25th May
quotequote all
SPDIF from the TV to the converter then RCA from converter to amp, may not have been true surround sound as you say but it was definitely surround of some sort and was good enough for me, will get pics tomorrow
Ordered the £9 one so will see how it works

quigonjay

Original Poster:

1,673 posts

247 months

Wednesday 27th May
quotequote all
DOH! Guess I should have done more research first, did not realise there are two different types of spdif, my TV has the coaxial output and this has the toslink, now that I know can't seem to find the correct device that I need, have messaged the seller to see if he has what I need and if I can swap it

OldGermanHeaps

5,047 posts

204 months

Wednesday 27th May
quotequote all
Does the amp not have coaxial spdif input?
Post some pics of what you are working with, its torture trying to sus it out without them.

LordLoveLength

2,324 posts

156 months

Wednesday 27th May
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quigonjay said:
DOH! Guess I should have done more research first, did not realise there are two different types of spdif, my TV has the coaxial output and this has the toslink, now that I know can't seem to find the correct device that I need, have messaged the seller to see if he has what I need and if I can swap it
Just search coax to optical converter. Plenty around the £10 mark.

quigonjay

Original Poster:

1,673 posts

247 months

Wednesday 27th May
quotequote all
OldGermanHeaps said:
Does the amp not have coaxial spdif input?
Post some pics of what you are working with, its torture trying to sus it out without them.
It does not, it is not easy to get a pic, it is close up against the wall with stretched out cables from both sides and do not want to have to disconect everything, It is ok though, I know what I need now
One more question - non of the correct coaxial converters seem to come with the coaxial cable from the TV to the converter, they all seem to include the Toslink cable but not coaxial, will any old coaxial cable do as I am pretty sure I have at least one lying around somewhere?

EDIT:will see if I can find the manual and take a pic of that instead

Edited by quigonjay on Wednesday 27th May 18:05

ShortBeardy

936 posts

170 months

Thursday 28th May
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Not sure you can get true surround sound using `digital out' from TV and `analog in' surround sound amp.
Surround sound digital signal is encoded to protect from copying and has to be decoded by either authorised chipset (manufacturer paid the licence), or one that has cracked the encoding. Audio and cheap DACs will not.

Current `standard' way to do this is use HDMI signal and surround sound processor/receiver/preamp that will decode properly and provide multiple channel output.

You can extract a stereo digital output from TV using SPDIF coax or toslink, and use cheap DAC to provide analog in to amp, but will be stereo. I've not had a problem with this but I only listen in stereo. Maybe your amp will derive surround sound signals from stereo input..?

quigonjay

Original Poster:

1,673 posts

247 months

Thursday 11th June
quotequote all
Does not work as well as I was hoping, barely sounds any better than through the headphone socket