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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 17 Aug 2018
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      I swear everything about this makes perfect sense and serves a purpose.pic.twitter.com/GWAhaoeSig

      5 replies 12 retweets 70 likes
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    2. Hector Martin‏ @marcan42 17 Aug 2018
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      So Behringer makes this nifty set of digital wireless mics with a USB dongle form factor receiver. Sadly, the Switch does not like it (probably because it only supports 48kHz 24bit stereo mode).

      1 reply 0 retweets 6 likes
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    3. Hector Martin‏ @marcan42 17 Aug 2018
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      However, it has an undocumented analog mode, which uses the SuperSpeed pins on a USB 3.0 Type A connector (even though this isn't 3.0) for analog audio and status, to work with some Behringer mixers. So I broke it out to minijack stereo (two mics, two channels).

      4 replies 1 retweet 10 likes
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    4. Hector Martin‏ @marcan42 17 Aug 2018
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      So I use a more typical USB sound card with the Switch instead. But when the switch detects a USB device with audio *output* capabilities, it unconditionally sends system audio to there instead of HDMI. So I need RCA out to my sound system, instead of using the HDMI audio.

      1 reply 0 retweets 4 likes
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      Hector Martin‏ @marcan42 17 Aug 2018
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      And then the Switch Joysound karaoke app only takes mic input from the left channel of USB audio devices, so I need to mix down stereo 3.5mm TRS to mono 3.5mm TS. Then I need a 3.5mm gender changer, RCA converter, and short RCA cable to plug it into the USB interface.

      11:43 PM - 17 Aug 2018
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      • Patriq Sergey Kostyuk Juan Traverso X41 Mike
      2 replies 0 retweets 5 likes
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        2. Hector Martin‏ @marcan42 17 Aug 2018
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          Now the long-term Right Way to fix this would be to reflash the Behringer dongle's USB frontend microcontroller to hand out USB audio descriptors that the Switch does like, but that's going on the longer-term project stack. This I cooked up in 15 minutes.

          1 reply 1 retweet 10 likes
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        3. Hector Martin‏ @marcan42 17 Aug 2018
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          And besides I wanted to be able to use the Behringer dongle as a generic analog-output wireless mic receiver anyway. Works well when powered with a USB mobile battery, gives you clean 3.5mm stereo line out.

          0 replies 0 retweets 7 likes
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        4. End of conversation
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        2. Ridley @ a safe distance‏ @11rcombs 17 Aug 2018
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          Replying to @marcan42

          where's the mixdown?

          1 reply 0 retweets 0 likes
        3. Hector Martin‏ @marcan42 17 Aug 2018
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          Replying to @11rcombs

          The first thing after the receiver is a 3.5mm TRS to TS. Nominally intended for mono to stereo (it just shorts the channels), but I checked that the Behringer dongle has in-line resistors (high output impedance) so it's safe to just short the channels together.

          1 reply 0 retweets 1 like
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