The AM64 accepts up to 64 channels comprising 32 stereo pairs of AES/EBU or AES3-id audio (selectable from the front panel) and provides format conversion to MADI (with switchable sample-rate converters). The MADI data is then presented either via coaxial or fibre outputs. The AM64 is compatible with both single-mode and multi-mode fibre and provides peace of mind with a redundant power supply.
There is no set up time involved with the AM64 which means transporting multi-channel audio from one facility to another and over distance is much simpler than might otherwise be the case. This is especially true when used in partnership with 4HM's existing MA64 which can take a MADI input and present the 64 channels as AES/EBU and AES3-id outputs simultaneously.
To the rear of the AM64 an ST fibre connector and a BNC provide the MADI output. Inputs are catered for by four 25 way Dsub connectors tackling balanced digital audio and a single 37 way Dsub for the unbalanced digital audio. There is a sync reference input on BNC and derived word clock and AES clock outputs both also via BNC.
The AM 64 fits neatly into the expanding 4HM range when considered in the context of the afore-mentioned MA64 and the inexpensive BOB-I and ASBO optional interface units. BOB-I is a 1U 'break-in' box that permits balanced AES/EBU on XLR connectors to easily interface with the AM64, the 1U ASBO allows 32 AES3-id pairs to be connected to the AM64 via BNC connections.
As with almost all 4HM products released so far, the AM64 is only a 1U device ensuring it occupies the minimum of 'real estate' which is especially important in OB trucks and flyaway systems. The result is that the 4HM family of products can provide a truly compact end to end solution at minimal cost.
(Claire Beeson)
