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Twisted Pear Superior quality electronic kits

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Old 12th June 2019, 05:17 PM   #71
cowboy99 is offline cowboy99  United States
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Default wasn't gonna drag that into it...but

Quote:
....issue for me was a lack of 8 channel source....
Not to be contrary, and I realize 2x2x2 is the logical octal.
But as 'source' I have tetrabytes of audio, video, dvda, mlp, sacd, etc.....files, formats, iso, On & on. And to my knowledge not one single 8 channel audio (music only) file.
Maybe I'm 'square' but as a multichannel 'Audio DAC' ....6 channel suffices.

8 channel seems more of a 'Home Theater DAC'

I'll give 'DTS HD Master Audio 7.1' it's due credit. But std DTS & Dolby is crap compared to a full MLP layer (ripMLP )

fwiw 2cents
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I'm kinda curious about that myself........
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Old 12th June 2019, 05:27 PM   #72
wealas is offline wealas
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If you want to implement active crossover, speaker and room correction in the digital domain and have 3-way speakers and a pair of subs you'll need 8 channels of audio (3x2 for the speakers +2 for the subs) even for stereo sound.
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Old 23rd September 2019, 10:39 PM   #73
AndriyOL is offline AndriyOL  Ukraine
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Quote:
Originally Posted by Russ White View Post
Yes. After a long time working on other things - I now have some time to get back to designing DACs. Forgive the long gap in time - but part of the issue for me was a lack of 8 channel source to test with. That situation is about to change - and now since I will have a suitable source I have a very serious use case for this application myself.

I am pulling back up the design Brian and I have been discussing and I will post where I am at with it very soon.

What I can commit to is that I have three major PCB projects in the works - a USB 8 channel source - and an 8 channel DAC with I/V stage(s) to match.

Again - I am sorry for the long silence - I have not lost interest in the hobby. Thanks for your patience.
That were good news. Any updates Russ?
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Old 10th February 2020, 11:14 PM   #74
AndriyOL is offline AndriyOL  Ukraine
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Would be great also to have HDMI eARC port to accept and decode 8ch BD audio sources
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Old 8th May 2020, 03:27 PM   #75
solarstabi is offline solarstabi  Australia
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Hi Russ & Brian, long time no chat. My B32 is still working fine.
My B-2 drops lock randomly & I can't find the cause.
Anyway, have for a while been tri-amping my speakers using Apple Mac Mini, Audio Unit (Isol8) plugins to 3 DACs, then amps/speakers. Works fine, sounds ok, but faulty B-2 leads me to consider updating.
Were B32, B-2, MF V-DAC; now B32, Oppo205 (temporarily), V-DAC (bass/mid/treble), 'cos B-2 fix eludes me.
Question re new 8 channel DAC: Will I be able to use new 8chan unit with plugins as XOs as I do now?
At the moment, Audio Midi app has an Aggregate device comprising 2 USB DACs & one Toslink DAC. I use Configure Speakers for 3 stereo streams, & use AUlab with one Isol8 plugin per stereo stream to split frequency bands for each driver. Works great, just uses 3 separate DAC appliances!
I'm hoping new DAC's USB can be configured as 4 stereo streams, each of which can be configured in AUlab for an Isol8 XO plugin to split frequencies for each speaker driver? That would be great, then I can have just one DAC appliance, instead of 3.

If your new 8chan dac board can serve as an Apple-based active speaker XO, & availability is imminent, put me down for one. I'm happy to use new Mercury boards too.
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Old 9th May 2020, 04:29 PM   #76
AndriyOL is offline AndriyOL  Ukraine
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Seems like this project was abandoned long time ago due to complications with 8ch iv stage or put in a shelf for future reserve. I guess no sense to wait anymore, need to find an alternative
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Old 9th May 2020, 07:14 PM   #77
stephen1212b is offline stephen1212b  United States
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Let me say again that I believe the first step needed toward the eight ch solution is the source.

We need an 8 ch usb / HDMI to I2S, supporting 32 bit and allowing great clocks, external clocks, and even re-clocking. Unleash a herd of Buffalo Pro's connected by teleporter's and problem expensively solved.

Then release the cost effective 8 ch DAC. Even a 38 Pro doesn't present the same current demands when divided into eight individual channels so the iv stage becomes much more straight forward. There could even be the option to combine the outputs back into stereo so we can play with combining parallel channels pre or post iv stage.
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Old 9th May 2020, 07:46 PM   #78
AndriyOL is offline AndriyOL  Ukraine
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I don't see the problem with 8ch source, there are ton of 24-32bit audio processors with 8ch i2s output. The one could use voltage output if iv stage isn't possible to be produced by now. Combining outputs was already realized in BIII before.There are no any obstacles to release BIV
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Old 9th May 2020, 08:34 PM   #79
stephen1212b is offline stephen1212b  United States
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If you or any member can point me to an 8 ch, 32 bit usb to i2s interface I would be very grateful. The only one I could find was Pink Faun but that is only PC not Mac compatible. I have been experimenting with DIYinHK Xmos but that is limited to 24 bit and I believe 192K without a custom driver. It also doesn't sound anywhere near as good as the Amanero combo 384 especially with the Cronus.
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Old 9th May 2020, 08:50 PM   #80
AndriyOL is offline AndriyOL  Ukraine
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I don't know usb to i2s interface, I just use i2s output from 8ch 24 or 32 bit audio chip. Free of charge solution for me)
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Last edited by AndriyOL; 9th May 2020 at 08:54 PM.
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