So... people have been on about this for a while - Linux on netbooks, Raspberry Pi builds, Arduino synths, etc.
It looks like the moment we've been waiting for might finally be here tho.
$15 single-board computer - The Pine64 is flexible in that it allows you to choose the operating system you prefer: Android 5.1, Ubuntu, OpenWrt, or Open Hab. All give you access to over 1.7 million apps you may use with your newly created device.
Priced at less than half of what the Raspberry Pi goes for, the Pine64 still comes loaded with features, including a full 64-bit architecture with the capability to run the latest OSes, a quad-core 1.2Ghz processor, 512MB DDR3 RAM, and 4K video output as standard.
For those looking for a bit more firepower and options, there is a Pine64+ available that comes equipped with either a 1GB or 2GB RAM for $10 more and features a camera port, LCD port, and a touch panel port all for $19.
So, like that
Would mean literally a $30 DAW if you're willing to roll up the proverbial sleeves and do some config.