KrisKasprzak
Well-known member
All,
I think my idea will work but could use some guidance in feasibility. I often shoot video interviews using my Canon 7D and a powered lapel microphone. Getting audio levels correct is a real pain since the camera will not show a UV levels during video recording. I can buy a device that goes between my powered mic and camera and shows UV meters and level adjustment. I'm a DIY kinda guy so... I want to build one using my teensy. Here's how I think it can be done.
1. use a Teensy 3.2
2. connect it to the audio adapter board for the teensy
3. connect my mic to the input of the audio board
4. connect the output from the audio board to my camera (I don't see a jack but assume there is a connection point)
5. connect my 2.8" tft LCD to the teensy 3.2 to show spectrum of the output to the camera)
6. have some volume control so I can adjust the level that is being sent to the camera (and monitor the spectrum with the display)
7. if enough pins are left use touch on the display to let me adjust the volume, etc. (i've been very successful in getting ILI9341 displays to work, with SD cards, touch).
8. use one of the spectrum examples that Paul supplied with the Audio-master library--maybe show some cute spectrum of voice plot like in the waterfallSpectrum example
10. maybe have some headphone output so I can listen to what's actually being recorded
11. Note my lapel mic is mono, so I guess i'll split split it to left and right before processing
Some initial questions
1. I'm not really sure what voltage levels "line out" are and if my Canon 7D will be compatible with the levels from the teensy audio board, anyone know?
2. the output from my lapel mic is powered (meaning it has some small batteries inside it), is the output considered "line in" and be compatible with the teensy audio board?
3. I'm guessing connect my mono mic to the L/R channels on the input of the teensy audio board and leave the L/R output to go directly to the Canon camera
Thanks in advance. I've never messed with audio processing so this is uncharted territory for me.
Robin, here comes an order for 2 audio boards
I think my idea will work but could use some guidance in feasibility. I often shoot video interviews using my Canon 7D and a powered lapel microphone. Getting audio levels correct is a real pain since the camera will not show a UV levels during video recording. I can buy a device that goes between my powered mic and camera and shows UV meters and level adjustment. I'm a DIY kinda guy so... I want to build one using my teensy. Here's how I think it can be done.
1. use a Teensy 3.2
2. connect it to the audio adapter board for the teensy
3. connect my mic to the input of the audio board
4. connect the output from the audio board to my camera (I don't see a jack but assume there is a connection point)
5. connect my 2.8" tft LCD to the teensy 3.2 to show spectrum of the output to the camera)
6. have some volume control so I can adjust the level that is being sent to the camera (and monitor the spectrum with the display)
7. if enough pins are left use touch on the display to let me adjust the volume, etc. (i've been very successful in getting ILI9341 displays to work, with SD cards, touch).
8. use one of the spectrum examples that Paul supplied with the Audio-master library--maybe show some cute spectrum of voice plot like in the waterfallSpectrum example
10. maybe have some headphone output so I can listen to what's actually being recorded
11. Note my lapel mic is mono, so I guess i'll split split it to left and right before processing
Some initial questions
1. I'm not really sure what voltage levels "line out" are and if my Canon 7D will be compatible with the levels from the teensy audio board, anyone know?
2. the output from my lapel mic is powered (meaning it has some small batteries inside it), is the output considered "line in" and be compatible with the teensy audio board?
3. I'm guessing connect my mono mic to the L/R channels on the input of the teensy audio board and leave the L/R output to go directly to the Canon camera
Thanks in advance. I've never messed with audio processing so this is uncharted territory for me.
Robin, here comes an order for 2 audio boards