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Post by Clive on Aug 26, 2016 9:50:50 GMT
I think it's stricly 5V in view of the chipsets used. You don't mess with that or with any computer board main supply. Hi Martin, are you therefore using a 5V reg between your battery and Pi? For some reason some of the power supplies are quoted at 5.1V....
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Post by MartinT on Aug 26, 2016 9:58:38 GMT
My battery outputs both 12V for the Caiman and 5V at 2A via the USB out for the Pi. Something like my XTPower MP-10000 10000mAh 12V battery with USB 5V 2.1A is what you need. 5.1V should be ok, but don't go much higher.
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Post by Clive on Aug 26, 2016 17:12:00 GMT
I have a suitable battery I can try, a 5200mAh 5V/2A. I'm getting a pukka mains PS to use whilst I set the thing up. Pi, PS, microSD, Digi+ and case are all ordered. The pi, PS and mSD should arrive over the weekend. Presumably if I load Volumio 2 without the Digi+ I won't be making my life hard...I'll just need to set Volumio 2 to see the Digi+ when I install it? I'll be using a USB drive with it's own PS to store music, I don't suppose the pi will ideal for powering my WD Passport drive.
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Post by ChrisB on Aug 26, 2016 17:15:50 GMT
It will work fine without the Digi+, and when it arrives, you just change a single setting in the Volumio software and off you go.
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Post by MartinT on Aug 26, 2016 17:46:31 GMT
As Chris says, it will output via the audio jack (which has poor sound quality) or to an external DAC via USB until then.
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Post by ChrisB on Aug 26, 2016 19:05:53 GMT
USB into a DAC is not ideal, but it's streets ahead of what oozes out of that squitty little headphone socket!
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Post by MartinT on Aug 26, 2016 20:43:16 GMT
Awful, isn't it!
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seanm
Rank: Trio
Posts: 162
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Post by seanm on Aug 27, 2016 10:06:52 GMT
Clive, Sorry I didn't reply yesterday, I was in London all day. Like Martin has said, A Pi expects a standard USB Power supply... Which mean 5 or 5 and a bit volts DC. In terms of just getting it to work, any USB recent smartphone charger is suitable, (apart from the oldest smallest ones which do not supply enough current (probably greater than 1000mA)). However, the good thing is that this 5V USB standard is common and is met by the battery packs used to recharge phones. Currently, I happen to be using one of these www.amazon.co.uk/gp/product/B012V9H3WA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 This is a sizable beast with a capacity approaching something like 1/3 to 1/2 of a small car battery! Frankly, it is overkill for this application, but useful for the phone if I'm "off grid" for a while. As an aside, airlines are getting twitchy about carrying Lithium batteries. Rules applied to the number and maximum capacity you can carry in hand and/or hold luggage. In Thailand this summer security were removing them from hand luggage and checking the small print. I was lucky... close but not exceeding the maximum. The rules do not seem universal across all airlines and airports at this time As a further aside, I am awaiting delivery of a Pi 3 today... < £29 from Amazon. I want to experiment with is as a full on media player (probably using Kodi) to see how it handles 1080p video playback etc. Once I finish playing, it will probably replace one of the Pi2's used for music. Cheers Sean
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Post by Clive on Aug 27, 2016 13:03:15 GMT
Thanks Sean....that's a monster battery!
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Post by Clive on Aug 27, 2016 19:30:43 GMT
The RPi setup with Volumio 2 has been really easy. I await the Digi+. The only foible which is inconsequential is that my music reports more artists than albums (326). The number of tracks looks about right at 9k. I've rescaned to no avail. All the music and structure looks to be there so it really doesn't matter. Powering my usb drive is fine too with a 2A ps. I'll try battery when I have the Digi+.
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Post by Greg on Aug 27, 2016 20:23:08 GMT
Clive, I'd seriously consider investing in a good regulated PSU. IMHO this is the best option for the best sound. Personally I don't sign up to battery use. It doesn't work for me. YMMV. I'll send you a PM.
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Post by MartinT on Aug 27, 2016 20:52:00 GMT
Some albums have multiple artist credits?
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Post by Clive on Aug 27, 2016 21:21:09 GMT
Some albums have multiple artist credits? There should be around 900 albums...they seem to be there but it's just the count that's wrong. The number of artists looks right. It's of no matter anyway. All seems to be working.
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seanm
Rank: Trio
Posts: 162
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Post by seanm on Aug 31, 2016 13:53:53 GMT
So the PI3 arrived on Saturday, I plan to use it for music playing duties. However, as I mentioned above, I thought I'd have a play first with using it as a full on "media centre". I installed "OSMC" : osmc.tv/about/I *think* that the correct way to describe this is as a minimalist Linux install which will allow the built in Kodi media centre app to run. My aim was to see how the PI3 HW would cope with a high bitrate, fast action, 1080p film with surround sound. It was relatively straightforward to set up and it seems to only use about 16% CPU when streaming HD video. The whole lot can be easily controlled via the "Kore" remote control app on my phone. There is a music side to the media centre, I pointed it my FLAC music collection on the NAS. It spent a while "consuming it" and has built a library with artist/albums etc. Album art seems to be making its way to the remote app on my phone. Playback is over HDMI. I've not had s chance to really listen to the quality, but initial feeling is that it is "OK". This plugs into the same AV amp as my existing PI2 with Digi+ daughterboard. Both use the amp's internal DAC. So side by side comparison should be easy. Cheers Sean
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seanm
Rank: Trio
Posts: 162
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Post by seanm on Sept 4, 2016 10:15:50 GMT
My phone seems to be learning about what interests me.... and this morning it pointed that I had missed the fact that the Volumio website has a shop bit.... For me, the interesting bit is that they now appear to be selling a version of the mamoberry DAC I mentioned earlier for around £42 volumio.org/product/collybia-mamboberry-ls-dac/This looks like a new or different version of the DAC I linked to earlier. It is based on the Sabre ESS 9023 DAC and they appear to have put effort into both the choice of onboard components and also the need for the power supplies to be carefully considered. There is an announcement on the Volumio blog here volumio.org/mamboberry-ls-dac-volumio-shop/This is partly what I like about this sort of project, for £42 there is a whole new set of tinkering and listening to be had, I will probably get one to play with once the new school term settles down 8-( Cheers Sean
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Post by MartinT on Sept 4, 2016 17:21:08 GMT
That's great information, Sean, many thanks!
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seanm
Rank: Trio
Posts: 162
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Post by seanm on Nov 19, 2016 13:27:14 GMT
I just wanted to signpost the following since I do not *think* that they have been covered elsewhere. The HW might be worth researching before sticking your hand in your pocket for something else Firstly, there is a new release of Volumio... I have *NOT* personally tried it yet VERSION: 2.029 RELEASE DATE: 18-11-2016 volumio.org/get-started/Secondly, there are a couple of interesting DAC related developments : There is a valve based Pi DAC daughterboard which is a curious development volumio.org/tube-raspberry-pi-i2s-dac-finally/Then there is a reclocker do-hicky which aims to reduce jitter volumio.org/allo-kali-i2s-reclocker-a-true-gamechanger/Currently, AFAIK this works with the "Piano" DACs and the Collybia – Mamoberry LS, but *NOT* the HifiBerry products Cheers Sean
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Post by MartinT on Nov 19, 2016 17:12:05 GMT
Then there is a reclocker do-hicky which aims to reduce jitter That could be really useful for those using the Pi over Wi-Fi networking, which considerably increases jitter. Shame about the lack of HiFiBerry compatibility, but maybe that will come.
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Post by mikeyb on Nov 20, 2016 14:54:04 GMT
I'm running my Pi with the Piano 2.1 DAC and Kali Reclocker from Allo.com and it is superior sounding to the same Pi fitted with the IQAudio DAC. Better imaging, better defined bass and wider soundstage all add up to a toe tapping experience
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Post by stanleyb on Nov 20, 2016 16:56:59 GMT
Anyone knows how it compares to the re-clocking circuit in the Caiman SEG?
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