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Old 28th April 2017, 08:21 AM   #1
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Default HiFiBerry balanced

Anyone know if it uses a different DAC since the output is now balanced?

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Old 28th April 2017, 08:38 AM   #2
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Good question! There is only 1 picture, where XLR sockets hide half the board... One can see the oscillators, the external PS, the I2S connections - but not the DAC

Curious as well if someone has more info on this!
Erik
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Old 28th April 2017, 08:43 AM   #3
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This is the additional info on the site:
ADDITIONAL INFORMATION

Weight 30 g
Dimensions 5.5 x 6.5 x 2.5 cm

Really? Who cares about the weight. Or the dimensions if one knows they fit on the rpi.

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Old 30th April 2017, 12:10 AM   #4
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Quote:
Originally Posted by Bas Horneman View Post
Anyone know if it uses a different DAC since the output is now balanced?

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I'll put my money on the PCM5242. After a quick glance at the chip's info, it looks to be in the same family as the PCM5102-22-42. The partial view of the board shows 2 on-board clocks, so it is likely designed to run in Master mod like the DAC+ Pro, which the PCM5242 should do too.

That would ease the driver development effort.

Another possibility is 2 PCM5122s... that'd be interesting and of course offer more modification/hacking opportunities. Of course, the Allo.com Piano 2.1 already uses that setup, though noone AFAIK is exploiting them yet for balanced output.

Greg in Mississippi
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Old 30th April 2017, 06:37 AM   #5
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Thank for weighing in Greg. I think your pcm5242 bet is probably right.

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Old 3rd May 2017, 07:36 PM   #6
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Hifiberry just told me they don't discuss circuit details when I asked them which dac they use. Pretty pathetic. Not like it's never going to be known. No more hifiberry for me.

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Old 3rd May 2017, 07:46 PM   #7
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I suppose they are trying to create the illusion that it is rocket science.

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Old 3rd May 2017, 07:47 PM   #8
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Car dealer: I'm sorry sir.. I can't tell you what engine is the car. We don't discuss that with potential buyers.

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Old 3rd May 2017, 07:57 PM   #9
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Hello allo.com piano 2.1

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Old 3rd May 2017, 09:09 PM   #10
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Ya know,

Daniel Matuschek (Hifiberry) and Florian Meier collaborated to bring the raspberrypi i2s we all enjoy today, lots of other boards rely on this work, and no doubt inspired other designs.

Just a few links off the top of my head:

https://www.ti5.tuhh.de/staff/meier/...p_embedded.pdf

koalo's blog: I²S Audio Support for Raspberry Pi

I2S and HiFiBerry driver now in downstream Raspberry kernel | Crazy Audio

Just sayin'
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