CatmanV2
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OK I'm stumped at this point.
As some of you know I'm a bit of a music buff and love music around the house.
What I currently have is a couple of Raspberry Pis with HiFiberry DACs attached.
https://www.hifiberry.com/shop/boards/hifiberry-dac-pro/
They are running a custom OS called Volumio
https://volumio.org/
These are all connected to my wired Gb LAN in my server cupboard powered by a multiway USB charger like this:
https://www.amazon.co.uk/gp/product/B00PK1IIJY/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
The drive into a large Rotel power amp via good quality phono cables. The Rotel is basically a 6 channel job, 3 pairs of left and right, which can be bridged or linked but essentially three separate stereo power amps in one **** off box.
Speakers are hardwired. One pair into the bedroom, one pair into the garden.
So they both work wonderfully. Individually.
So either pi connected to either input with either pair of phono cables produces perfect sound in the corresponding location.
BUT if I plug them both in at the same time, there's a terrible hiss / crackle on both pairs of speakers. This is irrespective of if either Pi is playing anything, or even if they have fully booted. The moment you apply power to the second device, the noise starts.
Ah Ha I thought. Power issues. So if I connect one pi to an external PSU everything is fine. So the Anker is not up to the job?
Not so. I have a third pi that I can connect to the Anker and power it up just fine, and no noise on the speakers.
If I have both the pis connected to the Anker and disconnect the phono plugs from one (either one, makes no odds) the noise on both pairs of speakers vanishes.
So
Both Pis on the Anker and connected to the Amp = Crackle
One Pi on the Anker and one Pi on $other PSU. Both connected to the Amp = No crackle
Both Pis on the Anker and only one connected to the Amp = No crackle.
Cables have all been checked (USB and phono, and swapped out)
I'm waiting for another microSD card to arrive tomorrow so I can flash a third Volumio instance and connect that the the third of the stereo pairs of the Rotel to see if that also makes the crackle.
What the **** is going on?
C
As some of you know I'm a bit of a music buff and love music around the house.
What I currently have is a couple of Raspberry Pis with HiFiberry DACs attached.
https://www.hifiberry.com/shop/boards/hifiberry-dac-pro/
They are running a custom OS called Volumio
https://volumio.org/
These are all connected to my wired Gb LAN in my server cupboard powered by a multiway USB charger like this:
https://www.amazon.co.uk/gp/product/B00PK1IIJY/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
The drive into a large Rotel power amp via good quality phono cables. The Rotel is basically a 6 channel job, 3 pairs of left and right, which can be bridged or linked but essentially three separate stereo power amps in one **** off box.
Speakers are hardwired. One pair into the bedroom, one pair into the garden.
So they both work wonderfully. Individually.
So either pi connected to either input with either pair of phono cables produces perfect sound in the corresponding location.
BUT if I plug them both in at the same time, there's a terrible hiss / crackle on both pairs of speakers. This is irrespective of if either Pi is playing anything, or even if they have fully booted. The moment you apply power to the second device, the noise starts.
Ah Ha I thought. Power issues. So if I connect one pi to an external PSU everything is fine. So the Anker is not up to the job?
Not so. I have a third pi that I can connect to the Anker and power it up just fine, and no noise on the speakers.
If I have both the pis connected to the Anker and disconnect the phono plugs from one (either one, makes no odds) the noise on both pairs of speakers vanishes.
So
Both Pis on the Anker and connected to the Amp = Crackle
One Pi on the Anker and one Pi on $other PSU. Both connected to the Amp = No crackle
Both Pis on the Anker and only one connected to the Amp = No crackle.
Cables have all been checked (USB and phono, and swapped out)
I'm waiting for another microSD card to arrive tomorrow so I can flash a third Volumio instance and connect that the the third of the stereo pairs of the Rotel to see if that also makes the crackle.
What the **** is going on?
C