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Post by MartinT on Mar 23, 2018 9:55:10 GMT
You can revive Li-Ion and Li-Po batteries from dead flat usually.
Not so lead-acid which are permanently damaged to a degree.
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Post by MikeMusic on Mar 23, 2018 16:06:13 GMT
Thanks. Charged overnight. Pi disconnected until I need it
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Post by MartinT on Apr 6, 2018 5:17:14 GMT
I've been playing around with the upsampling settings in Volumio via the DigiOne into my Caiman SEG. It does seem that a multiple of the sampling rate sounds best. So for Spotify (which is what I use my Pi for most of the time) at 48kHz, 24/96 sounds very good to my ears.
John has been playing with 32/96 and I shall give that a try tonight. The word length matters as it allows the interpolated points to be better defined, the question is whether the added accuracy offsets the greater amount of data to send to the DAC.
Last night was the smoothest, most detailed and least harsh I have yet heard Spotify. So close to CD in quality that it's amazing. Hugely enjoyable listening to such a vast library and linking one song to the next as it comes to me.
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Post by John on Apr 6, 2018 6:26:15 GMT
Out of all the changes I made to the pi upsampling to 32/96 has made the biggest difference to sound quality I agree just allows you to enjoy so much music.
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Post by Stratmangler on Apr 6, 2018 8:23:03 GMT
I am struggling to get my head around the idea of improvements when increasing bit depth from 24 to 32 bit. There's no data being added. All that is being added is a string of 0s. It's not even in the realms of upsampling, where an upsample creates in between points (note I hesitate to put mid point - sometimes it is, sometimes it's a completely new construct), where the process gets a DAC to change filter.
The idea of 32 bit was purely for mastering purposes (ie when used with a DAW), and as such it's possible to recover the data to its original, pre mastering state, should someone get a touch heavy handed in the process. It has never been part of the consumer specification, and the few consumer DACs that can handle 32 bit streams have been designed with mastering suites in mind, and usually Pro standard gear in a nice looking box.
Whenever I make a 24 bit recording on my Tascam recorder, and then import the resultant file into Audition, the additional bits are automatically added. When I save the file it saves as 24 bit. There is also an Audition recovery file which saves as 32 bit, and is proprietary to Audition.
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Post by MartinT on Apr 6, 2018 8:29:31 GMT
I agree that it seems unlikely to give a benefit. Upsampling from 48 to 96kHz is going to add one extra datapoint between each existing one. Does it require more than 24 bits to define that datapoint to the best accuracy of the interpolation algorithm?
I'm still going to listen tonight and find out.
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Post by John on Apr 6, 2018 15:40:56 GMT
Had another listen to 24/96 I am not noticing the difference I first heard But up sampling is the way to go to get the best out of the pi
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Post by MartinT on Apr 6, 2018 18:12:32 GMT
Ok, from 24/96 as a base (and noticeably better than no upsampling) I went with 32/96. I couldn't hear much if anything between them. Then I tried 24/192 and this seemed to be going the wrong way with the punch and attack slightly softened. Finally, I reverted to 24/96 but changed to Very High Quality (from High Quality) algorithm. I've settled on this as the best sound overall.
This renders Spotify outstandingly well. I listened to Lunatic Soul, Sarah McLachlan, Bach, Juliette Commagere, Passengers, Ry Cooder, Glass. All gave me more music, emotion and flow with less harshness. The choir in the Glass, especially, sounded natural with the bass voices especially thrilling.
I'm going to leave it like this and just listen for a good long time.
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Post by John on Apr 6, 2018 19:10:35 GMT
Yes very high quality makes a big difference and agree going higher is a backward step. As a benchmark how close is this to the Ayre
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Post by MartinT on Apr 6, 2018 21:47:21 GMT
It's pretty damned close for detail, soundstage and focus but loses a bit in absolute authority to the Ayre.
In other words, it's bloody superb.
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Post by John on Apr 8, 2018 6:22:53 GMT
I was listening to music via my USB stick. Sound was just great Jerry was so right about how good Spotify can be with my old server. I really did not consider Spotify as series source for high quality sound. It now my prime source and the plus point is I am discovering so much music now.
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Post by liffy99 on Apr 24, 2018 11:23:40 GMT
Thought I would try to connect to my RPI3 wirelessly (currently use Homeplugs and cables). Music library is on my IMac which is running LMS. Router all up and running and RPI IP identified. Have set Picore Player on RPI3 as follows; But cannot connect. CAn anyone give me a pointer ? Cant see why I would need to reboot the Imac.
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Deleted
Deleted Member
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Post by Deleted on Apr 25, 2018 11:43:37 GMT
I'm going to leave it like this and just listen for a good long time. Blimey ive not heard that from an Hi-Fi enthusiast before
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Post by MartinT on Apr 25, 2018 12:07:58 GMT
I'm playing hours of music and just loving it!
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Post by Stratmangler on Apr 25, 2018 14:14:44 GMT
Thought I would try to connect to my RPI3 wirelessly (currently use Homeplugs and cables). Music library is on my IMac which is running LMS. Router all up and running and RPI IP identified. Have set Picore Player on RPI3 as follows; But cannot connect. CAn anyone give me a pointer ? Cant see why I would need to reboot the Imac. You have already got LMS running on your iMac, so why are you trying to do anything from the RasPi end? Open up LMS on your iMac via a web browser (iMac IP address with :9000 suffixed) and see if there's an unconnected player (the Pi).
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Post by Stratmangler on Apr 25, 2018 16:23:48 GMT
This is what I was referring to by driving things from a web browser. Note the suffix on the address bar. The piCorePlayer entry on the players list is the Pi Squeezelite player (it's the default name).
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Post by John on Apr 25, 2018 16:28:48 GMT
Here is how I have volumio set up for best sound quality in Spotify
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Post by MartinT on Apr 25, 2018 16:34:38 GMT
Me too, John.
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Post by liffy99 on Apr 25, 2018 16:40:22 GMT
Hmm I have two entries on my router for the IMac ; one wired (to the router) and one wireless. i can login to the 9000 entry on either. One shows my RPI3 + Digiplus, the other my second RPI 3 with Allo digione. both RPIs are connected via ethernet / home plugs. if i disconn3ct either i cannot play through them.
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Post by Stratmangler on Apr 25, 2018 16:56:47 GMT
Can you post a screenshot of the LMS GUI on :9000 on the iMac?
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