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Yatrix Senior Member
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Joined: 11 Nov 2010 Posts: 281
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Posted: Mon Feb 11, 2013 10:59 am Post subject: MainBoard of M50 and.... USB Audio capability |
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Was thinking of implementing USB Audio inside M50 and opened the keyboard.
Below are some pictures of main board and its components.
I have no any knowledges on a hardware at all, but, IMHO, all components for USB Audio are already in place.
However I failed to understand why USB transmition limited to Midi only.
As a guess- Usb Audio is switched off on programming level.
May be it is possible to hack it ? Any ideas on the matter , guys,?
Main Board - top side:
Main Board - bottom side:
Korg chip:
DAC PCM 1793 supports up to 24 bits/192kHz and provides great quality of resulting analog audio signal.
Just wondering, what is the quality of audio samples in M50.... any info ?
Microprocessor MC9328MX1 - provides controllers for almost everything and for USB 1.1 connectivity as well.
So, theoretically, the computer should see M50 as USB audio device due to this chip supports such behavior.
Extract from datasheet:"...From the user’s perspective, the USB module hides all direct interaction with the USB protocol. The registers
allow the user to enable or disable the module, control the characteristics of individual endpoints, and monitor
traffic flow through the module without ever seeing the low level details of the USB protocol.
Even though this module hides all direct interaction with the protocol, some knowledge of the USB is required to
properly configure the device for operation on the bus. ..."
Some other components, may be you guys know what these are for ?:
and let's go back to components on Top side:
USB port type B , guess, with Usb Transiver chip
(sorry, very small, failed to catch it in focus)
![](https://lh5.googleusercontent.com/-ZJtT0XVAiRA/URjAzOScwXI/AAAAAAAAAGw/KHjjYqjEaAQ/s912/14_MainBoard%2520M50_USB%2520MIDI.JPG) _________________ Developer of Aldan III for Korg M50, KROME.
Please find the app at :
http://korgpatches.com/patches/m50/aldan_iii_trial
Documentation included in setup. |
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3nglenn
Joined: 18 Feb 2012 Posts: 9 Location: ALLEGANY COUNTY NY
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Posted: Wed Feb 13, 2013 1:07 pm Post subject: |
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You know, as long as you went through the motions of a teardown and pictures, too bad someone couldn't identify the problem capacitors (in the pics, if visible) that cause the freezing issues. G.P. |
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Yatrix Senior Member
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Joined: 11 Nov 2010 Posts: 281
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Posted: Thu Feb 14, 2013 1:26 pm Post subject: |
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Sorry, my friend, no idea on capacitors, better contact service. _________________ Developer of Aldan III for Korg M50, KROME.
Please find the app at :
http://korgpatches.com/patches/m50/aldan_iii_trial
Documentation included in setup. |
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Yatrix Senior Member
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Joined: 11 Nov 2010 Posts: 281
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Posted: Thu Feb 14, 2013 1:52 pm Post subject: |
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And, if to investigate matherboard carefully, one can see some holes/places (marked it with red rounds on pictures) which seems to be prepared for something ...just curious what it for:
![](https://lh4.googleusercontent.com/-oWgIHO6MwOA/URzpDxxIoQI/AAAAAAAAAJE/H-n4cJKW8Bc/s912/hole%2520in%2520main%2520board%2520top.JPG) _________________ Developer of Aldan III for Korg M50, KROME.
Please find the app at :
http://korgpatches.com/patches/m50/aldan_iii_trial
Documentation included in setup. |
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satya_music Full Member
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Joined: 10 Nov 2012 Posts: 125 Location: Bahrain
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Posted: Thu Mar 07, 2013 10:38 am Post subject: audio |
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Yatrix wrote: | And, if to investigate matherboard carefully, one can see some holes/places (marked it with red rounds on pictures) which seems to be prepared for something ...just curious what it for:
![](https://lh4.googleusercontent.com/-oWgIHO6MwOA/URzpDxxIoQI/AAAAAAAAAJE/H-n4cJKW8Bc/s912/hole%2520in%2520main%2520board%2520top.JPG) |
Dear brother,
Appreciate your interest.
Suggestion, if you open M3 also, then you can easily reach to the conclusion.
Wish you all the best.
B/regards,
Satya _________________ HARVESTmelodies
Jacinth Palace
satya_music@yahoo.com.au
Current gears: Korg PA700, Korg TR 61, Korg PA600, AKAI MPC 1000, M-AUDIO Mtrack Plus, Audio-Technica AT2020, Casio CTK5000, Nikon D5500 and Sony PJ410.
Previous gears: Korg Krome, Korg o1wFD, Yamaha PSR-S970, Yamaha PSR-S900, Yamaha PSR 2000, Yamaha PSR 520. |
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cano19781
Joined: 11 Sep 2014 Posts: 3 Location: Caracas
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Posted: Thu Sep 11, 2014 9:27 pm Post subject: Korg M50 Capacitor |
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I'm from Venezula, and We don't have any korg services here, by the way, my Korg M50 doesn't work very well, you know a very famous capacitor trouble, I have a very good friend of mine, and he is an electronical engeneer, I would like to know which specific capacitor we need to replace because we try to fix my keyboard, please somebody help us. |
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michelkeijzers Approved Merchant
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Joined: 08 Feb 2007 Posts: 9113 Location: Netherlands
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Posted: Fri Sep 12, 2014 10:01 am Post subject: |
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Aside from the hardware, it is impossible to change features etc, because if it is not programmed in software, even if the hardware would su pport it, it will never work.
Unless of course you change the software, but this is impossible (you would need source code etc); also it is illegal to do so. _________________
Developer of the free PCG file managing application for most Korg workstations: PCG Tools, see https://www.kronoshaven.com/pcgtools/ |
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Yatrix Senior Member
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Joined: 11 Nov 2010 Posts: 281
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Posted: Fri Sep 12, 2014 4:34 pm Post subject: |
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Thanks Michel for your recommendations,
However, instead of changing software of M50.... i've changed the hardware.
At present I own Roland FA-06 and that is magic gear with all functions I need directly on board and with a huge set of impressive sounds. I'm surprised with myself, but even don't feel any need to tweak presets because all sounds from Roland agree with my understaning/taste of how it should sound.
Even more, I'm still shocked with the fact that Roland produce sounds so authentically to real instruments.
ROLAND RULEZ !!! _________________ Developer of Aldan III for Korg M50, KROME.
Please find the app at :
http://korgpatches.com/patches/m50/aldan_iii_trial
Documentation included in setup. |
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