Famicom microphone question

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Pokun
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Location: Hokkaido, Japan

Re: Famicom microphone question

Post by Pokun » Sat Apr 25, 2020 10:13 am

Yes I did that last time I tried at least. I haven tried it in a long time now though.

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Sumez
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Location: Denmark (PAL)

Re: Famicom microphone question

Post by Sumez » Sun Apr 26, 2020 8:43 am

This thread made me think... and it's probably a dumb question, but I don't know a lot about hardware and electronic.

But if the Famicom Microphone can play its input over the TV audio, and the Famicom expansion audio works by simply wiring the cartridge pin to the console audio out, does that mean a cartridge could potentially include its own hardware to record microphone audio via that same pin, and get a better quality recording?

Fiskbit
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Re: Famicom microphone question

Post by Fiskbit » Sun Apr 26, 2020 8:59 am

Yep; Pokun discussed this earlier in the thread. The microphone audio going to the cart is already mixed with the APU audio, though, so if you want just the microphone, you can't be playing anything using the APU (but can using expansion audio).

aureus123
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Joined: Mon Mar 30, 2020 10:35 am

Re: Famicom microphone question

Post by aureus123 » Sun Dec 13, 2020 12:59 pm

Fiskbit wrote:
Sun Apr 19, 2020 6:40 am
This thread prompted me to put together a simple microphone test. This test records about 1.5 seconds of audio from the microphone to PRG-RAM and can then play it back. The audio is 1-bit and 43,653 Hz, which is as close as you can get to 44.1 kHz with constant cycles (41) per bit. It...sort of works, but I find that it's extremely hard to understand the recording.
Thanks for this. Now I wonder if it is possible to read/write data through mic/speaker of the famicom and an adequate modulation (I’m thinking something similar to C64 tapes).

That is, suppose a ROM with a little kernel that is able to convert mic signal to data and to write it on RAM, e.g. $400-$7FF. On could implement a 1K simple game and distribute it through an audio file, then the user only needs to run the kernel and play that file near the 2nd joystick.

Does my idea has sense or it’s crazy?? :?

lidnariq
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Location: Seattle

Re: Famicom microphone question

Post by lidnariq » Sun Dec 13, 2020 1:26 pm

Not only does it sound doable, but ccovell already did that!
viewtopic.php?f=2&t=9909

aureus123
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Joined: Mon Mar 30, 2020 10:35 am

Re: Famicom microphone question

Post by aureus123 » Sun Dec 13, 2020 1:40 pm

lidnariq wrote:
Sun Dec 13, 2020 1:26 pm
Not only does it sound doable, but ccovell already did that!
viewtopic.php?f=2&t=9909
Great :D Thanks!!

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