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Thanks Contrate_Wheel for help.

And thanks for this open source programme.



As you suggested, I recorded about a minute with Audacity, and I am trying to post it. But its an .aup file. This kind of file are not allowed to upload on this forum.

How can I send you the recording?
 

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Does this work on Windows XP?
 

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I'm thinking of porting this to Arduino to create an open source design for the hardware. It would be similar to the Weishi Timegrapher. Does anyone want to join in on development?


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Does this work on Windows XP?

I tried TG, on my XP laptop, and didn’t work. I got a very weak and inconsistent signal, so impossible to use it.

I guess, it didn’t work on my XP laptop because my soundcard was very basic.


For those of us, who got weak signal. I found a open source programme called: Guitarix, Virtual guitar amplifier.


I was wondering if this could fix the problem of TG low signal. If this programme some how could feed TG.


What do you think?
 

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Downloaded today Win binaries, works out of the box at Win10 x64... Really great stuff. Tried with builtin mic but it had too much noise. Then I tried with my phone's headphone/mic at it worked nicely. Since I'm away from home, I have only one watch to test, without calibration...
But...
When we speak about calibration, is it possible to use some prerecorded sample audio file from accurate source, which can be played on some MP3 or similar, so we can get proper calibration sequence instead of using quartz clocks?
Just a bare idea, but sort of could be interesting...
 

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ak about calibration, is it possible to use some prerecorded sample audio file from accurate source, which can be played on some MP3 or similar, so we can get proper calibration sequence instead of using quartz clocks?
I think that would require the MP3 to play through the same soundcard input as the pickup microphone - it's probably easier to just use a cheap quartz watch...
 

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When we speak about calibration, is it possible to use some prerecorded sample audio file from accurate source, which can be played on some MP3 or similar, so we can get proper calibration sequence instead of using quartz clocks?
Probably wouldn't work, since then you're using an uncalibrated DAC to play the file, so you'd have no idea if your resulting audio actually ends up faster or slower than it should be.

If you ran it through the same sound card that you're recording from... chances are it's using the same oscillator time reference for its DAC (for playback) and ADC (for recording), so there's no way actually tell if your sound card is running fast or slow if you do it that way.

Nevermind that whatever you recorded the sample audio file had to have a properly calibrated ADC to begin with...
 

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Probably wouldn't work, since then you're using an uncalibrated DAC to play the file, so you'd have no idea if your resulting audio actually ends up faster or slower than it should be.

If you ran it through the same sound card that you're recording from... chances are it's using the same oscillator time reference for its DAC (for playback) and ADC (for recording), so there's no way actually tell if your sound card is running fast or slow if you do it that way.

Nevermind that whatever you recorded the sample audio file had to have a properly calibrated ADC to begin with...
I have tg on two computers, desktop and laptop.

Desktop calibration is -8.2 sec.

Laptop is +2 sec.

This I believe supports IandK completely.
 
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Discussion Starter #292
Hi my friends!

Just a little message to announce the new version of tg, namely Tg 0.5.0.

New features include:
- Ability to take and save snapshots
- The distinction between light and regular version has been eliminated (it is now a setting)
- Minor improvements to the user interface

Snapshots are just what you think they are. The new version of tg can load and save files, which are basically archives of snapshots.

Windows, debian, and source code distributions are as usual available at:
https://tg.ciovil.li
https://github.com/vacaboja/tg

I have been in contact with dmnc, who has already tested the new version on Mac OS X. He will surely produce a homebrew install script for it shortly. (Thanks a lot dmnc for your continued support of Tg on OS X.)

On the technical side (for those interested):
- Version 3 of GTK+ has replaced version 2 as the widget library for Tg
- Thanks to an excellent contribution of Stefan Talpalaru, the build system is now based on GNU autotools.

Comments, suggestions, bug reports are as always very welcome!

PS: alvh, Klaus, landk, 1afc: completely agree, thanks for answering djolemag's question!
 

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Probably wouldn't work, since then you're using an uncalibrated DAC to play the file, so you'd have no idea if your resulting audio actually ends up faster or slower than it should be.

If you ran it through the same sound card that you're recording from... chances are it's using the same oscillator time reference for its DAC (for playback) and ADC (for recording), so there's no way actually tell if your sound card is running fast or slow if you do it that way.

Nevermind that whatever you recorded the sample audio file had to have a properly calibrated ADC to begin with...
Sorry for late reply, I'm away from home (vacation) so internet connection knows to be awful in accommodation facilities.
On my second thought, I see you are absolutely right... That was my first idea to get some more precise reference than unknown precision quartz clock. However, when I think further, quartz clock is stable reference because it is ticking in equal intervals between ticks, even if it is not accurate in 24h period, TG will detect "offset" or error of that quartz watch, right?
So, we apply that calibration offset and it should be ok?

Please correct me if I'm wrong....
 

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I have been in contact with dmnc, who has already tested the new version on Mac OS X. He will surely produce a homebrew install script for it shortly. (Thanks a lot dmnc for your continued support of Tg on OS X.)
The homebrew tap has now been updated so 0.5.0 on the Mac should be a simple
Code:
brew upgrade tg
if you already have it or
Code:
brew install dmnc/horology/tg
if you're just getting started.

I've been battling in vain with trying to create a pre-built mac app to ease installation but with little luck so far. If anybody has any experience bundling gtk+3 apps for the mac please do drop me a PM.


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Thanks for 0.50 contrate_wheel.

Just keeps getting better.
 

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I'm sure people already asked for, I've read the whole thread, but I would like to concisely highlight few features/upgrades that should be added.
1. Start/stop/pause/restart features : very convenient when you change the position of watch, so false/error readings (during change of position) are not written
2. Someone already mentioned lift angle in decimals... I know it will not cause too much errors, but maybe to reconsider adding it
3. Screenshots are really nice feature. One or two textboxes on mainscreen for comment would be great, so you can add what watch you measured in what position. Also, have you though of putting timestamp on screenshot, very convenient feature?
4. Printing ... AS I understood, it is in TODO list... My opinion is that it should have only measured values and paper graph - dots. Finally, it is enough to print it into PDF, then everyone can print it to physical printer if needed... Very common way for many diagnostic equipment.

Thank you once again for this great software !
 

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Also, I've seen a lot of people are using piezo microphone with amplifier.. So it is not a general problem, but I couldn't figure out about audio input: should be stereo or mono? If stereo, I have to wire it in parallel to get same signal on L and R channel?
I'm strongly for piezo pickup because reduction of environmental noise...
 

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quartz clock is stable reference because it is ticking in equal intervals between ticks, even if it is not accurate in 24h period, TG will detect "offset" or error of that quartz watch, right?
So, we apply that calibration offset and it should be ok?
That's not completely correct, I think. In my understanding, the calibration function in Tg assumes that the quartz watch is an accurate reference. The offset is calculated with the quartz as reference.
The author, contrate_wheel, explained the background in this post, especially the technical details near the middle of the post might be interesting for you.
 
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