MOTU M64chat_bubble_outlineFrom real comments

The M64 fills a niche no other interface really replaces. Users say the unique form factor and use case make the M64 hard to substitute with anything else on the market. One commenter specifically needs the M64 rather than the larger 112D because they don't require ADAT or AES ports, showing the unit is valued for delivering exactly the I/O needed without excess. This suggests it serves a precise niche for engineers wanting many MADI/AVB channels without the added complexity of digital protocol ports found on bigger MOTU interfaces, fitting particular studio configurations well.

Scaling channel count by chaining units raises real interoperability questions. One user asks whether connecting two or three M64 units together, with each seeing the others' inputs, would let them record 128 or 196 inputs simultaneously through a single computer connection via USB or Ethernet. Another asks whether monitoring is limited to just one stereo pair at a time out of the headphone output, unsure what 'any stereo pair' actually means. These questions show potential buyers are intrigued by the multi-unit scalability but remain uncertain how routing and monitoring behave in practice.

Availability and documentation gaps frustrate interested buyers. One commenter states plainly that these units are impossible to buy, noting their unique form factor and use case make them hard to substitute despite the difficulty sourcing one. Another praises a third-party review for covering details missing from MOTU's own YouTube channel, while a further comment simply asks whether to connect both coaxial and optical inputs or just one, suggesting official documentation leaves basic setup questions unanswered for prospective owners.