i've decided to make DSP 01 an open source project.

this is not one of those open source projects where i misdirect you to an indecipherable Github folder. i've organized my files in a clear way. i want you to be able to see exactly what i did, how i did it, and how to do it yourself.

i've put all my design files on an open source page where you will find everything you need to build yourself a DSP just like this one. you are welcome to.

the faster i give away these projects, the less reason i have to stand still. it's not like i will sell it anyways - i already have a (massive) day job, and much bigger ideas to chase. so this one is for you - build it, learn from it, use it everyday.

there are no strings attached. this is a gift.

Tshen2 2014

there's a bunch of different ways for ordinary people to transmit wireless audio.

nope! i'm kidding, you're stuck with Bluetooth audio. it is awful for these reasons.

way too much transmitter hardware. you need a.. smartphone? or something smarter?
complicated pairing process.
way too much latency (time delay in transmission).
you can only connect one thing to one other thing. proper wireless stereo is not an option.
limited to 16-bit compressed audio. you want 24-bit lossless audio? no.

that's miserable. are there other options?

SPDIF is a lossless, low-latency, 24-bit digital audio transmission standard, but it is not wireless - it usually travels through RCA cables, and no one makes a wireless SPDIF transmitter. or do they?

there's an analog video standard called NTSC. it's pretty low-quality (for video), and it also travels down RCA cables. and according to various sources, it requires 6MHz of bandwidth. SPDIF also requires 6MHz of bandwidth!

so both of these signals are transmitted through 75Ohm RCA cables. and both of them require the same amount of bandwidth. is it possible that a wireless NTSC transmitter will transmit SPDIF just fine?

these are reasons why NTSC transmitters can be bought for dirt cheap:

NTSC is old as heck, and NTSC equipment is obsolete by definition.
scale! people still use NTSC for security cameras and car backup cameras.

so some digging on The Amazons revealed this gem. it is a short-range wireless NTSC transmitter-receiver pair. it is meant to connect a car's backup camera to a screen on the dashboard. it costs $12.