I want to be very sure I'm powering my newly arrived Isolator correctly. Is there a difference other than connectors between the power jack input and the battery input pins. I expect to use either batteries or a supply with greater than 5 volts and want it to power the Isolator board and the Boss DAC. I'll leave my current linear supply on the RPi2.
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No difference between the 2.
On the barrel make sure middle pin is positive . I myself use it with 4 batteries . (2 serial 2 parallel about 6.6v output)
On the barrel make sure middle pin is positive . I myself use it with 4 batteries . (2 serial 2 parallel about 6.6v output)
No need to modify...just use 5V on Kali and set the jumper to (feed sbc)...that in turn will feed the isolator (5v its enough) and the stage above
You cannot modify the LDOs whiteout some serious work (to have them work at more than 5.5v)
You cannot modify the LDOs whiteout some serious work (to have them work at more than 5.5v)
Yes I know, but I wanted to use a LifePo4 PSU for the Isolator/Kali/Piano 2.1....
I have a couple of implementation and capability questions:
Thanks, this looks interesting.
- Will the Piano DAC work under Raspbian?
- Do I need to install a driver and/or configure a device tree overlay?
- Can I use the Piano DAC as 4 output channels without DSP (no EQ or crossover functions)?
- Can I access all four Piano DAC channels via ALSA?
Thanks, this looks interesting.
I'm using Volumio2 because seems to have better support for configuring the Piano2.1. I can't comment on other setups.
I have used DAC#0 with ALSA equalizer, but unfortunately it's only a 1 octave 10 band equalizer and configures via command line. There are some projects trying to add equalizers and convolution engines and make them configurable from Volumio's web intf. They are on my list, in the link listed below.
Yes you can access all 4 channels.
I have a TI PurePath GDE licence now, I'm trying some programming examples : Raspberry Pi with Piano2.1 DAC DSP and Volumio2
I have used DAC#0 with ALSA equalizer, but unfortunately it's only a 1 octave 10 band equalizer and configures via command line. There are some projects trying to add equalizers and convolution engines and make them configurable from Volumio's web intf. They are on my list, in the link listed below.
Yes you can access all 4 channels.
I have a TI PurePath GDE licence now, I'm trying some programming examples : Raspberry Pi with Piano2.1 DAC DSP and Volumio2
1. Kernel 4.9.36 onwards is required for final functionality.
As ususal it doesn't depened on the OS if a DAC is working, it'll depend
on the kernel first of all. You need to check what kernels your OS supports.
e.g. Arch is already on 4.9.36
2. In /boot/config.txt
dtoverlay=allo-piano-dac-plus-pcm512x-audio
With Kali master clock:
dtoverlay=allo-piano-dac-plus-pcm512x-audio,glb_mclk
3. The Piano 2.1 is 2 in / 4 out
Following modes are supported from kernel 4.9.36 onwards:
Standard-Modes: Dual-Mono, Dual-Stereo, DSP-Modes: 2.2, 2.1 (requires firmware for lowpass!)
Note: I played around with the DSP stuff. It's pretty basic and offers some fixed crossover frequencies via alsamixer. And that's about it. Pretty useless to me.
Beside that I experienced very strange behavior (phase issues etc.) when using the
early stage Dual-Mode firmware. Dual-Mode via DSP firmware is no longer supported.
The modes can be selected through amixer/alsamixer.
4. See 3
I'm currently running the DAC in Dual-Mono mode.
The outer jacks will be active. The inner jacks are muted.
Note: Dual-Mono mode doesn't mean that there are two outputs running in parallel per channel, as we know it from e.g. a lot of Sabre 9018 implementations!
Two channels just get muted by the driver. This approach might improve the crosstalk. But wouldn't e.g. lower the output impedance.
Allo is trying hard to get the documentation properly done. I'm in close contact to them ( some might call it "bugging them" ) about this and the driver updates.
In "Dual Mode" operation 384k will be possible to bypass the internal DAC filters as we know it from the Boss DAC.
When using the DSP for subwoofer operation 192k is the limit. (DAC restriction)
Moode will soon show up with all this integrated.
Note: Allo is trying to confuse us with terminologies around the DAC. E.g. there's no DAC Plus as the driver name suggests. Perhaps they'll manage to get that straight one day.
( You bet -- I mentioned that towards them more then once 😉 )
Enjoy.
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DJ , if you remove a diode on Kali, you will be able to feed from below.So basically using your Isolator (at 6.6V as requested)
Can you use a soldering gun ?
Can you use a soldering gun ?
piCorePlayer 3.21 was just released yesterday, and has the new Piano driver, and we have integrated the alsa mixer controls into the web interface.
News - piCorePlayer
News - piCorePlayer
yes, we have an extension downloader, with the latest Piano Firmware packaged. Once installed the firmware load is automatic by the driver.
While testing the latest Piano21 drivers, we're facing pretty weird behavior of the driver under certain conditions.
Obviously releasing the new kernels - respectively Piano21 support- with these problems still in, won't happen!!
Sorry CDSGAMES. I hope you'll get that fixed soon. I don't have to tell you that you guys are slowing down the process once again.
And.
By doing so , you cause us huge delays and long hours extra work to do design and sales support for your product only!
PS:
(I still have the impression you're not listening to the feedback I'm giving you in private!!! )
Obviously releasing the new kernels - respectively Piano21 support- with these problems still in, won't happen!!
Sorry CDSGAMES. I hope you'll get that fixed soon. I don't have to tell you that you guys are slowing down the process once again.
And.
By doing so , you cause us huge delays and long hours extra work to do design and sales support for your product only!
PS:
(I still have the impression you're not listening to the feedback I'm giving you in private!!! )
Will this battery holder in Product: BP-6AA | TASCAM which delivers DC 5V on DC Jack power properly the Allo Isolator?
Ok, I see, I dont have any meassures for the jack, I only noticed that it is compatible with this other one Tascam PS-P520E | 5-Volt AC Adapter which feeds a lot of other Tascam regular gear.
Edit: Just saw from
Edit: Just saw from
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