Aria Sinsonido preamp repair

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Re: Aria Sinsonido preamp repair

Post by Logarhythm »

Dr R wrote:I was thinking more that if there were too many constant peaks at high amplitude it was unpleasant and grating. In which case negative units would imply something very strange that I can't quite think of an analogy for..

If high amplitude events drag the LUFS rating up and are unpleasant/grating, then these are surely the tiresome bits of this traumatic "real life" concept - work, bills, supermarkets full of angry sunburned people etc.
Thus negative units significantly reduce the total LUFS figure - sort of akin to sorting out the gain structure to find more sensible headroom and space for proper dynamic range. In this "real life" thing, these events are therefore rejuvenating and allow proper context for these otherwise unpleasant peaks, so I guess things like time pottering on the DAW, playing an instrument (with the possible exception of bagpipes), a nice picnic etc contribute a reduction in the overall LUFS value?
It's rather tenuous (turns out "real life" may not be quite as simple as audio signals ;) ), but it's worth persevering with if it provides (pseudo)scientific justification for the more fun things :thumbup:
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Re: Aria Sinsonido preamp repair

Post by Dr R »

Logarhythm wrote: ...significantly reduce the total LUFS figure - sort of akin to sorting out the gain structure to find more sensible headroom and space for proper dynamic range. In this "real life" thing, these events are therefore rejuvenating and allow proper context for these otherwise unpleasant peaks, so I guess things like time pottering on the DAW, playing an instrument (with the possible exception of bagpipes), a nice picnic etc contribute a reduction in the overall LUFS value? :thumbup:

I think you have hit on something fundamental there. A nice picnic with friends should have low peak stress, and so contribute little to the integrated LUFS. But if in order to achieve it we have to deal with screaming kids, broken cars and wasps this is the equivalent of too much gain (and probably bad eq but we can work on that later), leading too excessive peaks.
Taking the analogy further, messing about on this subject in a forum is low peak, and reduces overall LUFS. Were Paul White to ask for these ramblings to be turned into a publishable thousand word column by Wednesday, that would require a huge gain increase,which would have to be followed by suitable calming activities.
Or something like that. ;-)
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Re: Aria Sinsonido preamp repair

Post by Dr R »

IT'S ALIVE :bouncy: It also fights back ...

Finally pushed real life out of the way for long enough to reconnect the board and the bass. Hooked it all up and did a quick test with everything electrically connected but not put back - excellent. Placed the board properly, put the pots and covers back on, tuned the bass to record some tests - and discovered an intermittent break in the connection to the output socket. My fault entirely so replaced the cable and retested. All good - hooray!

This is a very short recording to demonstrate the range of sound. This is recorded with a stereo headphone jack sending L&R directly to the two inputs of a ZoomH4N. Output on the guitar was about 3/4 max, gain on the Zoom almost nothing :-)

https://soundcloud.com/richard-rose-374426498/ariabasstonecomparison

The first scale is with the tone control set to maximum bass (ie max treble roll-off). It sounds like a bass guitar, and you can clearly hear the stereo separation with lower notes on the left of the image and higher to the right. The second scale is with the tone control set to max treble. You can hear there is a lot more HF, and clearly hear sound of my fingers sliding across every string. The two notes at the end are open strings, with max treble and max bass.
Prior to the repair it sounded like the full treble version, but worse ("pentatonic tinnitus" was one description). Post repair I reckon there is a pretty reasonable guitar there, and with the option to take two outputs and EQ them separately you could make all sorts of funkiness. Clean strings would help too.

My playing is very beginner level (as you can hear), so I roped in my son this afternoon to play a better demonstration for this forum, and to play it though an amp as well. He tuned up, and the tuning peg on the A-string promptly snapped! :o
All very frustrating, but Amazon have a set which one reviewer bought specifically for the same guitar when his snapped, so all repairable.

Most importantly: Huge thanks to everyone who has responded on this forum, and especially to Folderol for his time and effort (including multiple PMs to ask intelligent questions and respond to dumb ones). Another round of applause to that man. :clap:

Rich
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Re: Aria Sinsonido preamp repair

Post by Hugh Robjohns »

Excellent news, and :clap: to mr F for his detective work.
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Re: Aria Sinsonido preamp repair

Post by Martin Walker »

Indeed - three cheers for Folderol! Hip hip?

Hooray!! :clap::thumbup:8-)

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Re: Aria Sinsonido preamp repair

Post by Folderol »

Awww shucks :blush:
This has been a very enjoyable challenge, and I'm delighted it worked out so well. It certainly sounds good, and there is always an element of doubt when working entirely on test instruments.

Just a final suggestion for Dr R. Maybe print out the schematic on something like A5, then fold it up and tuck it in the compartment.
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Re: Aria Sinsonido preamp repair

Post by Dr R »

Folderol wrote:Awww shucks :blush:
Just a final suggestion for Dr R. Maybe print out the schematic on something like A5, then fold it up and tuck it in the compartment.

Already done so - and backed up the PDF file on OneDrive in the 'Music Tech' folder :D

My daughter asked what the estimated total time spent by everyone on this was, since March when I first borrowed the bass. Before I could answer my wife replied "They are all middle-aged men who like fixing things. Just be glad they don't buy motorbikes" Sounds good to me!

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Re: Aria Sinsonido preamp repair

Post by blinddrew »

Some of us have motorbikes as well... :oops:
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Re: Aria Sinsonido preamp repair

Post by Martin Walker »

Dr R wrote: My daughter asked what the estimated total time spent by everyone on this was, since March when I first borrowed the bass. Before I could answer my wife replied "They are all middle-aged men who like fixing things. Just be glad they don't buy motorbikes" Sounds good to me!

:bouncy::headbang::beamup:
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Re: Aria Sinsonido preamp repair

Post by Mathovani_music »

Dear Sirs,

I have Aria Pro Sinsonido. My problem is one of the the electret condenser microphone inside of the pickups was dead for the low strings. I've tries to replace with the other spare parts, but I lost the low frequency.
Perhaps, you can help me, where could I find the original spare parts of the electret condenser mic 6 x 5 mm.
Or does anyone have any idea where could I find the original pickups replacement for aria pro bass sinsonido silent bass.
Thank you.

Regards,
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Re: Aria Sinsonido preamp repair

Post by Dr R »

Hi Matthovani_music,

This is a ridiculously late reply to your post, but there's an off-chance you may read it and it may help.

Try the forums at Basschat.co.uk. There is a huge amount of tech knowledge there, and while I doubt many have seen a Sinsonido (other than a few who have played mine at a meet-up), there will be lots of knowledge on piezo pickups. I am more active there than here in the last couple of years, so if you do wander over I'll say hello.

Rich.
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Re: Aria Sinsonido preamp repair

Post by Sam Spoons »

blinddrew wrote: Mon Jul 30, 2018 9:37 pm Some of us have motorbikes as well... :oops:

And others just wish they (still) did :frown:
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