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Old 21st April 2013, 01:53 PM   #1701
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@ ppap64: Is noted (and solved), thank you!
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Old 22nd April 2013, 02:11 AM   #1702
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Question USB Streaming Mode

Quote:
Originally Posted by Lorien View Post
@ new2hifi: I've forwarded your question to Thesycon as I don't know how that Control Panel was designed nor knowledge about how it works. I'll post their answer right after I'll get it.............

Any news?


Hi Lorien:

I am sorry if the question has been already asked and answered but please help me understand a setting in driver's control panel

USB Streaming Mode
Minimum latency
Low latency
Standard
Relaxed
Extra Safe

Do these settings only relate to buffer size? Any effect on USB streaming/clocking? Do these settings affect jitter at all? Please write in detail.

Thanks
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Old 22nd April 2013, 02:45 AM   #1703
qusp is offline qusp  Australia
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nothing to detail, they are just different sizes of the setting for the same buffer. it will depend on your computer and what you are doing with it what setting you will need to set. they are primarily for recording, minimum latency might be used for live performance, where you need the 'instrument' to provide feedback or react quickly to changes you make, like a mixing console etc, relaxed may be used if you are recording with a DAW and need quite a bit of buffer to allow for processor intensive plugins
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Old 22nd April 2013, 06:38 AM   #1704
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@ new2hifi: unfortunately I was hit by a dead silence as my email caught Ute in a short holiday. I'll resend my message hoping that it will do something but I do not have strong hopes on that as I'm too small for Thesycon to "see" me
I would prefer to send a 'viable' answer directly from one of Thesycon's employee rather than give mine based on presumptions because I do not have access to any code related to that control panel. But, as gusp said above (thank you), it does help you in finding the optimal settings for minimum latency while avoid drops in playback (highly dependent on your PC). For example I try to use the "minimum latency" option almost all the time but switch to "low latency" when my PC is not capable to handle all the related USB streaming due to other extensive tasks.
I hope it helps,
L
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Old 22nd April 2013, 05:14 PM   #1705
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Quote:
Originally Posted by Lorien View Post
@ new2hifi: unfortunately I was hit by a dead silence a............................ as I'm too small for Thesycon to "see" me ..............................
Thanks qusp and Lorien.

Lorien, I hope you understand that I am just curious and not trying to push you for something. Nonetheless, I am really thankful for your effort.
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Old 22nd April 2013, 05:20 PM   #1706
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Lorien and all please forgive my ignorance but if we are trying to output 24bit, 192kHz from WaveIO, what would be the BCLK output? I am planning DIY PCM1704 based DAC and I believe that maximum BCLK is 25Mhz for PCM1704.
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Old 23rd April 2013, 06:47 AM   #1707
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There's no problem at all still I do not like the idea that I cannot help you here as I wished to! Anyway, yesterday I sent another email to Thesycon asking the same thing but I was hit by a second silence (again) and I have weak hope that it will change somehow!
As for the BCLK question: 32bit per channel (from which 24 are used for now) * 2 channels (stereo configuration) * 192000 Hz (sample rate desired) = 12.288 MHz freq. I suppose it's in the limits
I hope it helps,
Lucian
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Old 30th April 2013, 02:23 AM   #1708
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Default TDA1541A up to 176.4/192kHz

Quote:
Originally Posted by Lorien View Post
......As for the BCLK question: 32bit per channel (from which 24 are used for now) * 2 channels (stereo configuration) * 192000 Hz (sample rate desired) = 12.288 MHz freq. I suppose it's in the limits
I hope it helps,
Lucian
I was checking the datasheet of PCM1704 (www.ti.com/lit/gpn/pcm1704) and found the following on page 7, their formula is rather different.

Maximum Bit Clock (BCLK) Rate
The maximum BCLK rate is specified as 25MHz. This is
derived from the 8X oversampling of the PCM1704. Given
a 96kHz sampling rate, an 8X oversampling input and a
32-bit frame length, we get:
96kHz 8 32 = 24.576MHz

Nonetheless, can we change the bit frame length of WaveIO from 32 bit to 16bit?

WaveIO works fine with my TDA1541A up to 96kHz. On 176.4/192kHz there is extreme static with low music in background. Datasheet of TDA1541A says the maximum clock is 6.4Mhz. Thus, 176.4/192kHz material should work. However, I suspect it is perhaps too high for this old chip.
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Old 30th April 2013, 04:13 AM   #1709
Ben Mah is offline Ben Mah  Canada
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Quote:
Originally Posted by new2hifi View Post

WaveIO works fine with my TDA1541A up to 96kHz. On 176.4/192kHz there is extreme static with low music in background. Datasheet of TDA1541A says the maximum clock is 6.4Mhz. Thus, 176.4/192kHz material should work. However, I suspect it is perhaps too high for this old chip.
The TDA1541a in simultaneous mode (I2S input) accepts up to 96 kHz only as far as I know. For 192 kHz, simultaneous mode with separate data L to pin 3 and data R to pin 4 is required. The WaveIO does not provide this output. Iancanada has something coming out in groupbuy that can do this.
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Old 30th April 2013, 07:15 AM   #1710
Ben Mah is offline Ben Mah  Canada
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Quote:
Originally Posted by Ben Mah View Post
The TDA1541a in simultaneous mode (I2S input) accepts up to 96 kHz only as far as I know.
Meant to say in "multiplexed two's complement mode", not "simultaneous mode".
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