Allo Piano 2.1 support

[Tim Curtis]

Allo had some grand ideas but abandoned support for devices once released and configured them for only the current not extant linux kernels.
Every device I purchased from them has fallen by the wayside through lack of vendor support..some latterly some almost immediately after release.
They had some excellent attempts and were well reviewed with items often being sold out and back-ordered months ahead so not sure just why they collapsed. Income seems to have been secure given demand worldwide but perhaps they were just too broad in range or too heavily invested in 'Sparky' or just too uninterested in supporting their product.

Allo's business like many others around the world was destroyed by the bad economics and job losses caused by the Pandemic. 

That left us with fewer choices for innovative, "high-end" I2S audio devices. There are only a handful of vendors left in that space now. The majority of vendors are selling overpriced, poorly documented, average quality boards.