Hi everyone,
A few weeks ago I've received the latest Gigaworks dac with CS4398 and upsampling board. I've tried to play some 192/24bit audio files thru the optical input, but it doesn't seem to work(jumper set up on quad speed). 96/24bit files works without problems. Does anyone knows if there is a limitation on the optical input?
A few weeks ago I've received the latest Gigaworks dac with CS4398 and upsampling board. I've tried to play some 192/24bit audio files thru the optical input, but it doesn't seem to work(jumper set up on quad speed). 96/24bit files works without problems. Does anyone knows if there is a limitation on the optical input?
I don't know this first hand, but from what I've read even if you could get it to work with the right torx receiver it would be severely compromised with high jitter levels. I don't know what torx unit they are using now, you'll have to do a little digging.
Best, Bill
Go to Ebay, then to the Gigawork store. They offer 2 versions and also offer complete units in cases, either CS4398 or PCM1798 I believe. The CS4398 version is closest to the original version. Decware is also packaging them and selling them for close to $1000.
Best, Bill
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I seem to recall that being a limitation. The USB input is really a complete USB DAC chip if memory serves me right, and it's limited to 24/96KHz. It spits out SPDIF to the input chip. It's a bit of a tortured signal path.
Sheldon
hi,
I have one of those boards mine has the cs8414 and the cs4398,
The cs 8414 data sheet says to 96/24,
Check it out http://www.datasheetcatalog.org/datasheet2/5/0qz86g32jz6e62j7okr99itaigcy.pdf
Now if you have the CS8416 your in business, http://www.cirrus.com/en/pubs/proDatasheet/CS8416_F3.pdf
Now can anyone say if it's pin to pin compatible or say what needs to change?
I went searching for music above 96/24 there's some but no alot yet.
Thanks alot, Cheers
I have one of those boards mine has the cs8414 and the cs4398,
The cs 8414 data sheet says to 96/24,
Check it out http://www.datasheetcatalog.org/datasheet2/5/0qz86g32jz6e62j7okr99itaigcy.pdf
Now if you have the CS8416 your in business, http://www.cirrus.com/en/pubs/proDatasheet/CS8416_F3.pdf
Now can anyone say if it's pin to pin compatible or say what needs to change?
I went searching for music above 96/24 there's some but no alot yet.
Thanks alot, Cheers
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I get the same thing on the coax. I had to put it on one of the single (00 or 01 - not sure which one) speed settings in order for it to work.
I think the reason is, because you're not upsampling when it sees 192k. This is just a guess. Try it and see if it works.
After some thought, I think I actually removed the upsampling module in order for the 192k to work. I'll check this when I get home.
You may be right, I don't know how the 8421 would react with a 192 input, but its output is always 192.
In my experience the CS8421 handles 192KHz input just fine, although I haven't got any content at that rate (all my content is redbook).
The masterclock on the CS8421 can limit the upper end of the sample rate spectrum. The chip can handle sample rates over 200 KHz with the right mater clock. The max clock is 27 MHz, and if memory serves me right the gigwork DAC uses a clock of less than 25MHz.
Sheldon
Sheldon, have you made any more boards? I'm sure there are a few of us that would like to try it, including me.
For those of you into the smaller kinds of mods, just completed one which I'm really quite pleased with.
Extremely simple, I just used a 75R resistor, plus a Russian K40-9 PIO 0.01uF capacitor and soldered those directly to the SPDIF phono input socket, and at the other end directly to the daughter-board pin of the CS8416.
Wasn't expecting much - if anything - but was pleasantly surprised. Bass seems to have more 'kick' and low-down welly, sound overall is a little 'sweeter' and a slight course-ness to the sound I noticed now and again seems to be gone. Sound seems to have opened out a little too i.e. that feeling you get when the size of the sound seems to dwarf the size of one's speakers?
Perhaps treating the SPDIF signal (which is afterall - at this point - analogue still in terms of it being sent through an interconnect) in the same way as a signal/music carrying one by using a decent quality capacitor has paid off here, or perhaps it's the leap-frogging of that SPDIF input transformer, or merely just soldering directly to the daughter-board..... or perhaps all three 😉
Anyways very cheap and easy to try, and reversible easily if you prefer the original configuration.
- John
Extremely simple, I just used a 75R resistor, plus a Russian K40-9 PIO 0.01uF capacitor and soldered those directly to the SPDIF phono input socket, and at the other end directly to the daughter-board pin of the CS8416.
Wasn't expecting much - if anything - but was pleasantly surprised. Bass seems to have more 'kick' and low-down welly, sound overall is a little 'sweeter' and a slight course-ness to the sound I noticed now and again seems to be gone. Sound seems to have opened out a little too i.e. that feeling you get when the size of the sound seems to dwarf the size of one's speakers?
Perhaps treating the SPDIF signal (which is afterall - at this point - analogue still in terms of it being sent through an interconnect) in the same way as a signal/music carrying one by using a decent quality capacitor has paid off here, or perhaps it's the leap-frogging of that SPDIF input transformer, or merely just soldering directly to the daughter-board..... or perhaps all three 😉
Anyways very cheap and easy to try, and reversible easily if you prefer the original configuration.
- John
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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Mmmm getting some problems now alas 🙁
Getting the odd popping noise now and again (2 or 3 per track, sometimes in quick succession) - similar to when someone turns on a light or the heating thermostat etc. and it comes through on mains sensitive equipment. Perhaps the digital lock isn't 100% spot on now? Checked all solder joints and nothing is amiss. Was also careful not to apply too much heat to the solder joint too so I doubt (hope!) the receiver chip isn't damaged.
Guess I'll have to go back to the previous configuration - pity as apart from those pops it was showing promise.
I'll try it on the optical input - that should narrow things down if that input is clean.
- John
EDIT: wander if I should completely break the pin/leg to the daughter board, just incase there's any reflections or something coming from being still connected via the pins to the original circuit (output end of the SPDIF input transformer).
EDIT2: All fine via optical (whew!) so there's something amis with the SPDIF mods. Perhaps I do need to break the RXP0 PIN from the CS8416
daughter board which plugs into the main circuit PCB.
Getting the odd popping noise now and again (2 or 3 per track, sometimes in quick succession) - similar to when someone turns on a light or the heating thermostat etc. and it comes through on mains sensitive equipment. Perhaps the digital lock isn't 100% spot on now? Checked all solder joints and nothing is amiss. Was also careful not to apply too much heat to the solder joint too so I doubt (hope!) the receiver chip isn't damaged.
Guess I'll have to go back to the previous configuration - pity as apart from those pops it was showing promise.
I'll try it on the optical input - that should narrow things down if that input is clean.
- John
EDIT: wander if I should completely break the pin/leg to the daughter board, just incase there's any reflections or something coming from being still connected via the pins to the original circuit (output end of the SPDIF input transformer).
EDIT2: All fine via optical (whew!) so there's something amis with the SPDIF mods. Perhaps I do need to break the RXP0 PIN from the CS8416
daughter board which plugs into the main circuit PCB.
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