Life of Pi

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George Hincapie
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Re: Life of Pi

Unread post by George Hincapie » Tue Jul 17, 2018 12:09 am

In my experience, a great power supply makes a huge difference to Pi audio. You've made a great investment.

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Fretless
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Re: Life of Pi

Unread post by Fretless » Tue Jul 17, 2018 9:28 am

AudioRecruit wrote:
Mon Jul 16, 2018 11:47 pm
I have an allo boss (latest version) on my pi, I bought the dedicated psu also as recommended. This is running volumio and running flac files from my nas. It’s brilliant and the detail is fantastic over any other I’ve heard. £90 all in, worth every penny! I’ll be running this with my NVA when I purchase it.

Cheers,
Then think about putting Allo's Kali Reclocker in there, adding a Linear PSU to the Pi and using WAV files instead of FLAC's (you WILL hear the difference - certainly with an NVA setup).

(Evil laugh) :twisted: :twisted: :twisted:
Main: NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
DAC: Metrum Acoustics Musette CD Transport: Cambridge CXC
Headphones: AQ NightHawk & NightOwl Amp: Schiit Magni-3
DAC: Cambridge DacMagic Plus + Sbooster LPSU

George Hincapie
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Re: Life of Pi

Unread post by George Hincapie » Tue Jul 17, 2018 11:44 am

Second the Kali suggestion, I've read some amazing reviews of that little board.

Pi based audio is incredible value.

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Fretless
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Re: Life of Pi

Unread post by Fretless » Wed Jul 18, 2018 12:42 pm

Image

There are those who quite like the 'ORAC' - styling of many Pi-based audio units with their clear plastic plates and brightly flashing LED's - it's geek heaven!

However there are more serious souls around who don't want something that looks like a refugee from the Tardis (sorry, different show) cluttering up their carefully-arranged-in-order-of-expense, black, brushed-metal, esoteric components.
Well they can now proudly add the cheapest and most cost-effective digital source to their 'rig' with pride thanks to Allo's new range of deluxe, aluminium cases.

Image

Look a bit like a Dalek, don't you think ???

Image
Main: NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
DAC: Metrum Acoustics Musette CD Transport: Cambridge CXC
Headphones: AQ NightHawk & NightOwl Amp: Schiit Magni-3
DAC: Cambridge DacMagic Plus + Sbooster LPSU

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Fretless
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Re: Life of Pi

Unread post by Fretless » Wed Jul 18, 2018 12:56 pm

PS: the aluminium casing is also designed to act as one big heat-sink for the Pi's circuitry - supposedly improving the overall performance.

Looks like I'll have to raid the piggy-bank again. :doh:

https://www.allo.com/sparky-eu/aluminum ... layer.html
Main: NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
DAC: Metrum Acoustics Musette CD Transport: Cambridge CXC
Headphones: AQ NightHawk & NightOwl Amp: Schiit Magni-3
DAC: Cambridge DacMagic Plus + Sbooster LPSU

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slinger
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Re: Life of Pi

Unread post by slinger » Wed Jul 18, 2018 12:58 pm

I bought a very nice sardine can for my Pi/Digi+

Image

Not so much "Space Age" as "Valve Radio Age" but it's steel, and solid as a rock...made of steel.
Amps - NVA P50, A30, A40, Stanislav Palo Tube Headphone Amp BB 85
Speakers - Monitor Audio Silver RX2
Cables - NVA LS1+LS3, SSC, Gotham S/PDIF, IBRA Optical
Digital - NAD C516BEE, SONY ST-SDB900 DAB TUNER, TEAC UD-H01 DAC
Analogue - Pro-Ject Debut Carbon Esprit SB, Graham Slee Gram Amp 2 Phono
Cans - Grado SR80, ATH-M50X

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Fretless
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Re: Life of Pi

Unread post by Fretless » Sat Jul 21, 2018 12:09 pm

Now I can quite happily pass up on 'tweaks' which have a purely cosmetic purpose, but when I see the words 'improve performance' then I get hooked. On the Allo website they give a link to a little table that shows how the new aluminium casings for their Pi sets reduce and stabilise the operating temperature of the Pi's processing chip which should allow the device to run more efficiently.

Fortunately my usual stockist in Eindhoven had one of the cases for the Pi/DigiOne unit and that arrived in the post yesterday. Disassembly of the old case and assembly of the new one took about half-an-hour. There is a handy instruction video that shows you exactly how to put it all together.

https://youtu.be/kUY43iuH8G0

A thermal heat-exchange pad rests on the CPU chip and transfers the heat to a metal plate in-between the Pi and Allo boards. This plate is an integral part of the casing and so, whilst running, you can feel that the whole case becomes slightly warm.

The are a couple of niggles:
1) the fit of the Allo board is rather tight and needs careful maneuvering and pressure to get it correctly in place.
2) the BNC socket is too close to a 'leg' to allow the thin locking nut to be put on - not really needed anyway.
3) there is a 'cut-out' in the same leg for the micro-USB plug used to power the unit. This was a very tight squeeze for the chunky plug from my LPSU and I shaved off a millimeter of rubber from the edge of the plug with a Stanley knife to get it to go in more easily.
4) Use a glue for the rubber feet which sticks to metal (I didn't at first).

However you end up with a really cool-looking and super-solid-feeling device that sits mysteriously in the audio system and will leave others thinking: "What the hell is THAT?".

Image

(NB - the double Jitterbugs sticking out of the side are purely optional)

Switching on - with the only light now visible from the Pi being the connection LED for the Ethernet cable, for the rest it is dark and brooding.

No changes further, so into Volumio and blast through some of the music I had been playing recently.
There is an immediate and definite change is the level of detail: sharper, clearer, more definition between instruments. Joni Mitchell's voice can come across as a little 'grainy' and piercing - that effect is reduced. A favourite track is 'Down on the Farm' from Camel's 'Breathless' with the hilarious lyrics from Richard Sinclair and farmyard noises in the background - Now I am picking up little sounds I have never noticed were there before.

Camel - Down On The Farm (Breathless - 1978)

It will be a while before I get the full impact of what the new casing means (RF screening?? flux damping??) but it is an audible upgrade and it may seem that a 55 Euro case is expensive for a Pi - but if you want the ultimate then you have to suffer for it!

:dance: :dance: :dance:
Main: NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
DAC: Metrum Acoustics Musette CD Transport: Cambridge CXC
Headphones: AQ NightHawk & NightOwl Amp: Schiit Magni-3
DAC: Cambridge DacMagic Plus + Sbooster LPSU

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terrybooth
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Re: Life of Pi

Unread post by terrybooth » Sat Jul 21, 2018 2:01 pm

eagle.jpg
eagle.jpg (6.11 KiB) Viewed 677 times
Pioneer PL71/DL103/ Phono2/HiFiPi/P90SA/TIS/CubixPro two-up

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Lordie82360now
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Re: Life of Pi

Unread post by Lordie82360now » Sat Jul 21, 2018 2:02 pm

I have the same "dalek" case on my digione and agree with his comments on the tight fitting for the power plug and the inability to fit a thin locking nut on the BNC socket. However, its performance outlays its quirkiness and I love both the sound and looks.
It has taken me a long time to settle on a streamer and it has the ability to run an external hard drive for my music library direct through volumio 2 into my dac and onwards. I won't be changing it anytime soon!
What the hell is that indeed!
Digital Source: Allo Digione player, AQ Jitterbug, Volumio 2, Beresford Caiman SEG Mk2, cheap Chinese Dac, IPad 32gb, iPhone 6.
Amplifier: NVA P20/A20 combo, Temple Audio Bantam.
Interconnects: NVA Digital SSP mk2, NVA SSP mk2.
Headphones: AKG K92, AKG K451
Speakers: Quad S1, modded Rega Kyte and NVA LS1, LS2.

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Fretless
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Re: Life of Pi

Unread post by Fretless » Sat Jul 21, 2018 3:36 pm

Well spotted Terry - I'll be changing the name of my audio system to 'Moonbase Alpha' :grin: :guiness;

Image

... but does that include the girl with the purple wig, though?

Image
Main: NVA: P50sa - SSP - A40 - LS6 - Cube3
Digits: RPi 2B/Allo DigiOne/Volumio/Tomanek ULPS/AQ Jitterbug
DAC: Metrum Acoustics Musette CD Transport: Cambridge CXC
Headphones: AQ NightHawk & NightOwl Amp: Schiit Magni-3
DAC: Cambridge DacMagic Plus + Sbooster LPSU

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