I have a Yamaha 2404 console and need an ad converter with about 16 channels. Iv seen a lot of converters and audio interfaces but most only have 8 inputs or are very expensive. I'm looking for something that has around 16 line inputs, at least 2 outputs, and a way to connect it to my computer (MacBook Pro). I'm looking for something used so I can get it cheaper. I'm looking to spend about $300 or less. If anyone knows anything even similar to that please let me know. Thanks.