[PIPO Project] M8HD

[paulf]

It's one thing after another! I recently upgraded (?!?!) to windows 8.1 so had to install drivers and etc. Now I've run into the 'device cannot do switch because of no drive' error. Great. I see there's some sort of solution involving finger contortions and various buttons .. have given it a whirl, but no joy, will try on another computer!

[stevejc]

There is an app called: reboot by Petrus that is installed by Riley use it to reboot to bootloader

https://play.google.com/store/apps/details?id=fr.petrus.tools.reboot&hl=en_GB

[paulf]

Doh! Will give this a go asap. Thanks very much for your help. I know nothing!

[paulf]

Brilliant. Thanks everyone. You've been hugely helpful. It's all working now. Places like this make the internet a good place to be.

[paulf]

Even better, I just spent a few minutes trying to work out how to get the USB audio working and now I've got that happening too (plug the output into 'host'). This is fantastic. Thanks all round to everyone doing such good work.

[paulf]

Hello again - some bugs, or issues at any rate. I'm wanting to use this tablet to stream music from my nas, hence wanting the cifs. USB audio is an added bonus that I hadn't expected to find. At present my main music system is windows driven to give bitperfect output to my DAC/amp/speakers. Most of my music is in lossless formats. I had thought that this wasn't something that would be possible with Android for a while yet so was very happy to find that USB audio had been implemented for this tablet. All good so far. However, in order to get bitperfect out you need a player that will actually do this without upsampling or downsampling but unfortunately there don't seem to be many. I tried tried Neutron, but that didn't cope at all well with cifsmanager & kept crashing it. But then I read that this player doesn't give a true bitperfect output anyway. Next up, the app that most audiophile types seem to be recommending, USB Audio Player Pro. This seems to be the only app that will do a true bitperfect output for android, but if anyone knows any different I'd be pleased to hear about it. Anyway, I installed this app but each time I start it up it causes the tablet to restart.

I suppose I'm asking a few questions here: is anyone else interested in bitperfect output? If so what player do you use? Has anyone else tried USB Audio Player Pro with any success, and is there anything I might do to have success myself?

Thanks in advance.

[stevejc]

USB audio player pro uses its own driver for USB audio.Maybe there is a conflict.
You can test bubbleupnp. It has cool feature player, upnp renderer and many more like cast service.
I use it to play song from my squeezebox server. All my files are flac files and they play well without any problem.

https://play.google.com/store/apps/d...bbleupnp&hl=fr

[paulf]

I've been using poweramp for a few years on my old tablet. It plays everything but it doesn't send out the data untouched which I what I want. I've got a lot of high res files (24/96) and whilst poweramp will play them it downsamples them to 16bit & from what I can see it looks like bubbleupnp does the same thing. Anyway, sorry, this is slightly derailing the topic! Perhaps a separate audiophile thread is required.

[stevejc]

In fact, I think that this limitation is due to ROM.

See that post on XDA : http://forum.xda-developers.com/show...08&postcount=4

actually in /system/etc/audio_policy.conf we have only AUDIO_FORMAT_PCM_16_BIT and sampling_rates 44100|48000

we must add new sampling_rates and AUDIO_FORMAT_PCM_24_BIT

I'll try next week

[paulf]

Ah, I see, but even with 24bit sampling rate added there isn't a player around that will output to 24bit.

[raxy]

paulf,
the main reason I jumped on android tablet was the hope for outputting high quality audio from it.
as the quality of analog output of pipo tablet will never be top class because of the cheap chips used inside, digital audio seemed the only way to go.
before we could get android natively handle usb audio (to an external dac),our first solution (by stevejc) was to patch KitKat and the kernel to do that, then we were able to rebuild the kernel from source including native Linux support for usb audio.
but anything more than redbook digital audio seems to need additions to the very old 3.0.36 kernel we must keep for many reasons,
and I think we still have some work to do to have bit perfect and more than 44/16 playback on our tablets, including finding something better than that f*cking UAPP
for me, the quality obtained by playing aac files thru ess sabre dac or as an input to a digital amplifier or digital headphones is already much much better that before and is ok for now.
regarding access to the media massive database, my suggestion is to avoid using WiFi and use the bandwidth of USB instead of that old NetBIOS era protocol.

[stevejc]

Ah, I see, but even with 24bit sampling rate added there isn't a player around that will output to 24bit.

I see this Onkyo HF Player : https://play.google.com/store/apps/d...icplayer&hl=fr

You can test USB audio Player : https://play.google.com/store/apps/d...audioplayerpro

I get a crash first but after reset , it's OK

My small DAC is only 44/16 so ...

[paulf]

Thanks for the replies. I agree that getting high quality audio out from a tablet would be a great thing, plus I also agree that the usb out already sounds much better than using the jack! As for wifi, well, I don't have many options in that area, other than to buy miles of cable.

I did try USB Audio Player, but also got a crash of the tablet. When you say 'reset', do you mean using the reset button or simply restarting the tablet?

The Onkyo looks interesting, I'll give that a go, thanks!

[stevejc]

when I say reset. Yes the tablets hangs so need to use reset button and restart.

[paulf]

Interesting ... mine restarts itself, it doesn't hang.