DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 207 - diyAudio
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Old 2nd August 2012, 01:10 PM   #2061
bcmbob is offline bcmbob  United States
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Not sure if this is the right way to ask this question or if it is really valid, but I'll throw it out there.

For those who have hands-on (maybe ears-on) experience, is the effort involved in implementing straight I2S to the chip - justified by the real audible quality improvement. I ask this in reference to this particular DAC, not as a general concept - thus hoping to hear from some who have actually made it work.

Thanks
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Old 2nd August 2012, 02:17 PM   #2062
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hey bob, i'll have an answer for ya once my waveIO board arrives this month

not to derail your inquiry but has anyone figured out how to work the slow roll-off filter on this chip?

when i tried the filter in the past with pcm1704 (the switch required cutting a leg from df1704 reciever) the sound became liquid. just lovely.

i image the result will be even better with 4396, or perhaps it's already activated? because it does sound smoooth~
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Old 5th August 2012, 10:33 AM   #2063
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I have started shopping around for the components to upgrade the MINI2496 according to Dario's BOM but I am struggling finding some good smoothing caps for the opamp rails. I found some 3300uF FW's, and just wanted to make sure that they would be ok substitute for the 2200's on the BOM. Being just smoothing caps it seems like it should not matter much but I am worried that I might be missing something.
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Old 5th August 2012, 05:02 PM   #2064
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Quote:
Originally Posted by vertue View Post
I found some 3300uF FW's, and just wanted to make sure that they would be ok substitute for the 2200's on the BOM.
3300uF would be better than 2200uF. I use 6800uF.


And now for something completely different ..


Has anyone been able to play 24bit/192kHz with this eBay toslink module?
Click the image to open in full size.

I put it on my CS4398 and it now plays only 96kHz.

Last edited by tamphist; 5th August 2012 at 05:09 PM.
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Old 5th August 2012, 05:51 PM   #2065
bcmbob is offline bcmbob  United States
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Yes, but I'm not sure what that means. Using JRiver the settings are straight through WASPI and the windows 7 driver is set to play 192. The Audio path drop-down however is reporting 44.1 / 24 bit on the output side. I'm still checking for some other settings to see if 192 can go through the software.

In any event, what I'm hearing is great>
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Old 5th August 2012, 06:19 PM   #2066
bcmbob is offline bcmbob  United States
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Found it.

Encoding Settings - JRiverWiki

1. Use CBR / ABR Encoding: Target Bitrate: 32, 64, 96, , 128, 160, 192, 256, 320 (Kbps)

2. DSP Studio - Output Format - Right Click in Sample rate box - "Set All to 192...".

Tools - Audio Path - Output now reports 192/24.

On some songs sync is lost causing the need to close the program. Still investigating.
Attached Images
File Type: jpg JR192.jpg (76.8 KB, 577 views)
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Last edited by bcmbob; 5th August 2012 at 06:26 PM.
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Old 5th August 2012, 07:17 PM   #2067
bcmbob is offline bcmbob  United States
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It is still a little confusing. Windows explorer shows the file to be 192k in the datails tab of the properties dialog. First photo shows a 192 source but the Audio Path drop-down indicates there is some sort of re-sampling going on. STRANGE>

BTW: The "96" LED is on while playing 192.

Also: The toslink playback is very sensitive to a good square straight solid fit of the plug. There are static-like blips and the LEDs flash accordingly. The BNC/RG59 connection shows no such problem - super stable.
Attached Images
File Type: jpg 192a.jpg (150.4 KB, 566 views)
File Type: jpg 192b.jpg (179.2 KB, 543 views)
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Last edited by bcmbob; 5th August 2012 at 07:32 PM.
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Old 6th August 2012, 05:14 PM   #2068
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Quote:
Originally Posted by bcmbob View Post
Found it.
Tools - Audio Path - Output now reports 192/24.
Yes. eBay toslink module can play 192khz. My CS8416 had pin 20 high,
so it could only play 108 kHz max, as I learned from here:
DAC: CS4398 with CS8416+CM102s

and here:
http://www.cirrus.com/en/pubs/appNote/AN339REV1.pdf

..
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Old 6th August 2012, 08:52 PM   #2069
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Quote:
Originally Posted by bcmbob View Post
Not sure if this is the right way to ask this question or if it is really valid, but I'll throw it out there.

For those who have hands-on (maybe ears-on) experience, is the effort involved in implementing straight I2S to the chip - justified by the real audible quality improvement. I ask this in reference to this particular DAC, not as a general concept - thus hoping to hear from some who have actually made it work.

Thanks
Bob Check out post #1531
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Old 7th August 2012, 08:56 AM   #2070
bcmbob is offline bcmbob  United States
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Thanks,

To All - I don't know where it will go or what level of interest there is, but I started a new thread in an attempt to collect information on i2s. Please contribute if you are interested and /or experienced. Thanks.

I2s Usage With DIY DACs
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