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Post by MartinT on Nov 22, 2017 15:10:57 GMT
I swapped the RPi 2 to my newly received Pi 3 with new high speed SD card. Native wi-fi means no more dongle, too. Cor blimey, it boots up quicker! Everything setup as before and it's playing nicely. It sounds different. I can't put my finger on it exactly, but it's different. Still playing music on my day off  |
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Post by John on Nov 22, 2017 15:13:08 GMT
Yes start up quite quick
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Post by The Brookmeister on Nov 23, 2017 23:21:07 GMT
FLAC is lossless compression so should be the same as WAV only smaller. Yes, I know about the CPU overhead but I also now know that clocking and low jitter are by far the most important things. I use the Lossless uncompressed setting on dB when ripping. WAV are an utter waste of HDD Space to me. If you cannot hear the difference that's fine, I can. Listening using a CAD DAC and Melco WAV is extraordinarily good. |
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Post by Deleted on Nov 24, 2017 16:19:23 GMT
Wow wee  |
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Post by MartinT on Nov 24, 2017 19:50:50 GMT
I've just done some soldering to connect up my newly arrived DC-DC converter to the 12V batteries for powering the Pi 3. Initial listening is very promising! Photo and details later.
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Post by John on Nov 24, 2017 20:25:10 GMT
good news
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Post by MartinT on Nov 24, 2017 20:56:15 GMT
So here it is: the entire Pi/DAC subsystem running from 12V lead-acid batteries. - Raspberry Pi 3 with Allo DigiOne S/PDIF board in Allo case - Chinese step-down DC to DC converter (12V in, 5V out) with case available here- 2 x 12V 2100mAH Yuasa lead-acid batteries in parallel - 12V smart battery charger - QED Performance co-ax cable - Beresford Caiman SEG running in Mode 4 - 3 x snap chokes It sounds more relaxed than running the Pi from my mobile battery (which steps 3.3V up to 5V) with a little more detail and insight. I have snap chokes on both sides of the DC to DC converter to keep switching noise away from everything else. The extreme low impedance of the lead-acid batteries give the effect I was after, very low noise floor and filigree detail. I have rigged the smart battery charger to charge the batteries for one hour per night on a timer.  |
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Post by John on Nov 25, 2017 7:03:09 GMT
I ordered a 12v dc to 5v dc converter
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Post by MartinT on Nov 25, 2017 11:36:48 GMT
Just for fun, I thought I'd calculate how many hours I can run the Pi and SEG on these batteries.
The Pi with DigiOne consumes 340mA (see photo). I can't get the spec on the SEG power consumption but I seem to remember the Caiman-II was around 60mA, so let's call it 100mA. That's 440mA.
The batteries are 2100mAH each, so 4200mAH combined in parallel. However, they're stepping down so the effective capacity is 12 * 4200 / 5 = 10080. The efficiency of buck DC to DC converters is around 90% so we have a capacity after step-down of 9072mAH.
That gives us a running time of 9072 / 440 = 20 hours. Not bad!
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Post by MartinT on Nov 25, 2017 13:29:41 GMT
This is the best I've ever heard Spotify. Quite superb. I'll be leaving the Pi setup alone now.
EDIT: I'm back on the Blue Jeans 1694A coax cable as sounding very slightly more natural.
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Post by MartinT on Dec 13, 2017 7:07:25 GMT
At long last I've started building the sitting room sound system using the gorgeous Atacama rack that I bought from Paul Stewart. Sources are the Sky HD box and Pioneer BDP-LX55 Blu-ray/DVD/CD/SACD player, DAC is my previous Caiman-II fully modded to latest spec, amp is a Sony TAF-something and speakers are Wharfedale Diamond 9.1. I'm going to plumb in the DAC tonight - was listening to the Sky box audio outputs last night, which are a bit meh.
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Post by MikeMusic on Dec 13, 2017 12:42:30 GMT
Be interested to see pics when done !
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Post by Deleted on Dec 13, 2017 16:44:49 GMT
The default audio outputs of the Sky box are very average, but it appears to have a decent enough optical output, so I could imagine it sounding rather nice once connected to your Caiman.
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Post by MartinT on Dec 13, 2017 17:22:08 GMT
It certainly did sound good in my old house. Doing it tonight having just found all the bits I need.
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Post by MartinT on Dec 13, 2017 20:01:17 GMT
Ah that's much better, just put the Caiman-II into Mode 3 and it's doing the business.
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Post by MartinT on Dec 14, 2017 5:59:01 GMT
Still roughly assembled and no cable tidying before anyone comments! It sounds a lot nicer than TV sound.  |
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Post by Deleted on Dec 14, 2017 23:07:55 GMT
Oooo no Sky Q? You’ve just got to get Sky Q, Martin.
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Post by MartinT on Dec 15, 2017 6:51:01 GMT
I will as soon as we've installed the 4K TV. Not until February as the fireplace needs to go in first.
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Post by Deleted on Dec 15, 2017 18:10:00 GMT
Makes sense, you really need a 4K TV for Sky Q.
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Post by MartinT on Dec 15, 2017 18:55:54 GMT
Not convinced on the Q interface. The HD box firmware has improved remarkably of late and I don't want to take a backward step.
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