[Project] Music Thing Radio Music 4hp sample player

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dooj88
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by dooj88 » Wed Apr 01, 2020 9:34 am

thats a kind offer, thank you. ill report back after more troubleshooting

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oootini
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by oootini » Mon Jul 27, 2020 5:19 am

Wondering about the Radio Music 2017 firmware and stereo files. How are stereo files actually handled? Are they downmixed to mono at output time, or does one of the channels get removed before playback? I searched the thread, couldn't see an answer...

Thanks :)

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by cliffemu » Mon Jul 27, 2020 8:58 am

oootini wrote:
Mon Jul 27, 2020 5:19 am
Wondering about the Radio Music 2017 firmware and stereo files. How are stereo files actually handled? Are they downmixed to mono at output time, or does one of the channels get removed before playback? I searched the thread, couldn't see an answer...
I recommend batch-converting your files to mono.

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Datum
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Datum » Mon Jul 27, 2020 2:10 pm

oootini wrote:
Mon Jul 27, 2020 5:19 am
Wondering about the Radio Music 2017 firmware and stereo files. How are stereo files actually handled? Are they downmixed to mono at output time, or does one of the channels get removed before playback? I searched the thread, couldn't see an answer...

Thanks :)
Per the instruction on Tom Whitwell's github the samples need to be converted to mono. I've think I accidentally uploaded a stereo file in the past and the Radio Music played it sped up (a la Alvin and the Chipmunks).

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by batchas » Tue Jul 28, 2020 5:38 am

oootini wrote:
Mon Jul 27, 2020 5:19 am
Wondering about the Radio Music 2017 firmware and stereo files. How are stereo files actually handled? Are they downmixed to mono at output time, or does one of the channels get removed before playback? I searched the thread, couldn't see an answer...
The last 2 comments might be misleading, making think stereo files won't play or won't play properly which IMHO is not the case. Maybe they are refering to 96/24 stereo, which is not handled as it uses too much memory, but the rest below is ok, I have stereo files on my sd card, like for instance 44100Hz/32 bit and they play just fine.

I guess both channels get mixed as I can't imagine any channel being removed before playback. To get more infos I guess it's best to go to the Audio Library for Teensy forum, as in the code I don't see how stereo is transformed to mono.
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Tue Jul 28, 2020 8:34 am

I seem to have just fried my second Radio Music. Was removing it from the rack while powered up so I could adjust the trimmer to reduce gain and distortion. When I put it back, I must have shorted some pins against the adjacent module's faceplate - it's dead now.

I removed the Teensy and TL074 and did the voltage tests. Zero voltage anywhere. Suggests I have blown something in the power supply. Any suggestions what to replace?

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by glennfin » Tue Jul 28, 2020 9:08 am

How do you do that?..... Audacity? I've been converting files for my Nutella Tusnami one by one in Audacity to convert to mono, sample rate, and remove the metadata.... batch processing would certainly save me a lot of time. :confused:

I recommend batch-converting your files to mono.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by gelabs » Tue Jul 28, 2020 9:20 am

If you have access to a Linux distribution, command-line tools like sox and fmpeg are invaluable for this kind of task.
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by BartBral » Tue Jul 28, 2020 9:27 am

Jumbuktu wrote:
Tue Jul 28, 2020 8:34 am
I seem to have just fried my second Radio Music. Was removing it from the rack while powered up so I could adjust the trimmer to reduce gain and distortion. When I put it back, I must have shorted some pins against the adjacent module's faceplate - it's dead now.

I removed the Teensy and TL074 and did the voltage tests. Zero voltage anywhere. Suggests I have blown something in the power supply. Any suggestions what to replace?
Maybe try L1 and L2...

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by BartBral » Tue Jul 28, 2020 9:33 am

glennfin wrote:
Tue Jul 28, 2020 9:08 am
How do you do that?..... Audacity? I've been converting files for my Nutella Tusnami one by one in Audacity to convert to mono, sample rate, and remove the metadata.... batch processing would certainly save me a lot of time. :confused:

I recommend batch-converting your files to mono.
I'm on MacOS and I use the free XLD sample conversion utility.
https://tmkk.undo.jp/xld/index_e.html
[EDIT] Never mind, XLD doesn't convert wavefiles to mono[/EDIT]


Or as mentioned above SOX is very handy for sample conversion... But it doesn't come with a GUI. But you can write Bash-scripts to automate the process, but that take some trial and error... and a lot of Googling.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by cliffemu » Tue Jul 28, 2020 10:47 am

glennfin wrote:
Tue Jul 28, 2020 9:08 am
How do you do that?..... Audacity? I've been converting files for my Nutella Tusnami one by one in Audacity to convert to mono, sample rate, and remove the metadata.... batch processing would certainly save me a lot of time. :confused:

I recommend batch-converting your files to mono.
Audacity -> File -> Apply Chain -> Apply to Files ;)

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col
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by col » Tue Jul 28, 2020 5:52 pm

BartBral wrote:
Tue Jul 28, 2020 9:27 am
Jumbuktu wrote:
Tue Jul 28, 2020 8:34 am
I seem to have just fried my second Radio Music. Was removing it from the rack while powered up so I could adjust the trimmer to reduce gain and distortion. When I put it back, I must have shorted some pins against the adjacent module's faceplate - it's dead now.

I removed the Teensy and TL074 and did the voltage tests. Zero voltage anywhere. Suggests I have blown something in the power supply. Any suggestions what to replace?
Maybe try L1 and L2...
I doubt that the ferrite beads or resistors would have blown, especially seeing that there are two reset-able fuses. Try swapping out the teensy with the "other" Radio Music.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Tue Jul 28, 2020 8:37 pm

col wrote:
Tue Jul 28, 2020 5:52 pm
BartBral wrote:
Tue Jul 28, 2020 9:27 am
Jumbuktu wrote:
Tue Jul 28, 2020 8:34 am
I seem to have just fried my second Radio Music. Was removing it from the rack while powered up so I could adjust the trimmer to reduce gain and distortion. When I put it back, I must have shorted some pins against the adjacent module's faceplate - it's dead now.

I removed the Teensy and TL074 and did the voltage tests. Zero voltage anywhere. Suggests I have blown something in the power supply. Any suggestions what to replace?
Maybe try L1 and L2...
I doubt that the ferrite beads or resistors would have blown, especially seeing that there are two reset-able fuses. Try swapping out the teensy with the "other" Radio Music.
Thanks. I am not game to try a working Teensy for fear that I fry another one (possibly). Anyway, zero voltages suggest that it probably won't work.

Do the fuses automatically reset? Is there a possibility they are 'stuck'?

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col
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by col » Tue Jul 28, 2020 11:28 pm

Do you have a multimeter? Check for continuity across the fuses.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Tue Jul 28, 2020 11:29 pm

col wrote:
Tue Jul 28, 2020 11:28 pm
Do you have a multimeter? Check for continuity across the fuses.
Yes - obvious now!

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col
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by col » Tue Jul 28, 2020 11:33 pm

When you say there is zero volts, where and how are you checking the power?

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Tue Jul 28, 2020 11:57 pm

col wrote:
Tue Jul 28, 2020 11:33 pm
When you say there is zero volts, where and how are you checking the power?
I was using the build doc guide. Multimeter in Volts mode, ground near the power socket and looking for +/-12v in the middle pins of the TL074 sockket.

I'll check the continuity of the fuses later when I finish work.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Tue Jul 28, 2020 11:58 pm

Jumbuktu wrote:
Tue Jul 28, 2020 11:29 pm
col wrote:
Tue Jul 28, 2020 11:28 pm
Do you have a multimeter? Check for continuity across the fuses.
Yes - obvious now!
I meant 'Good idea! Why didn't I think of that?'.
:)

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col
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by col » Wed Jul 29, 2020 12:27 am

Jumbuktu wrote:
Tue Jul 28, 2020 11:57 pm
col wrote:
Tue Jul 28, 2020 11:33 pm
When you say there is zero volts, where and how are you checking the power?
I was using the build doc guide. Multimeter in Volts mode, ground near the power socket and looking for +/-12v in the middle pins of the TL074 sockket.

I'll check the continuity of the fuses later when I finish work.
If you are not getting power at the 10 pin power socket, then it must be either the ribbon cable, a connector or your Eurorack power supply.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Wed Jul 29, 2020 1:14 am

col wrote:
Wed Jul 29, 2020 12:27 am
Jumbuktu wrote:
Tue Jul 28, 2020 11:57 pm
col wrote:
Tue Jul 28, 2020 11:33 pm
When you say there is zero volts, where and how are you checking the power?
I was using the build doc guide. Multimeter in Volts mode, ground near the power socket and looking for +/-12v in the middle pins of the TL074 sockket.

I'll check the continuity of the fuses later when I finish work.
If you are not getting power at the 10 pin power socket, then it must be either the ribbon cable, a connector or your Eurorack power supply.
I didn't check the voltage at the power socket itself, so I should do that as well. However, the other modules in that rack have not been affected.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Wed Jul 29, 2020 2:45 am

Ok, went back and did the tests properly. I must have been tired when I did it last night. I used hooked probes to get the ground secure this time.

I now get the correct +12v / -12v on the middle pins of the TL074 socket, and +5v for the Vin pin on the Teensy socket. I guess I can now safely test with another back board. If it works, next step would be to swap out the TL074 and then eliminate it (so it's the Teensy) or not.

Thanks for making me think this through properly.

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col
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Re: [Project] Music Thing Radio Music 4hp sample player

Post by col » Wed Jul 29, 2020 2:48 am

Are your Radio Music DIY ones? Sometimes on the factory ones the Teensy has been soldered in.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Wed Jul 29, 2020 5:24 am

col wrote:
Wed Jul 29, 2020 2:48 am
Are your Radio Music DIY ones? Sometimes on the factory ones the Teensy has been soldered in.
DIY.

Ok, so the front board works with the second back board.

Tried to reflash the Teensy. No sign of life. Looks like it's cooked :(

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by Jumbuktu » Wed Jul 29, 2020 5:49 am

Follow up question: Does it have to be a teensy 3.1? Don't seem to be many around now. 3.2 or later.

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Re: [Project] Music Thing Radio Music 4hp sample player

Post by smiler » Wed Jul 29, 2020 8:05 am

Jumbuktu wrote:
Wed Jul 29, 2020 5:49 am
Follow up question: Does it have to be a teensy 3.1? Don't seem to be many around now. 3.2 or later.
I have a 3.2 in mine. I think the only difference between 3.1 and 3.2 is that the 3.2 have a beefed up on-board regulator so it can drive more hardware off its 3.3V regulator.

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