HD621 HDMI Audio Processor User Guide
HD621 HDMI Audio Processor User Guide Important safety instructions • • • • • • • • • • • • • Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
HD621 HDMI Audio Processor User Guide Back panel The following diagram gives details of the back panel connections: Meridian Comms H6 Game H5 VCR1 HDMI Input H4 Sat H3 Cable H2 TV H1 DVD HDMI Output Video Meridian HD621 RS232 MMHR Output 1/2 5/6 3/4 7/8 Smartlink BNC DIN Meridian Comms HDMI sources HDMI video output Replace with same type Fuse T1.
HD621 HDMI Audio Processor User Guide Overview HD621 product highlights FIFO buffering • • • • • In addition to the features noted above, the HDMI audio processor de-jitters digital audio received via HDMI using two FIFO (First In, First Out) buffer systems. This ensures that the audio extracted from the HDMI stream is of the highest quality.
HD621 HDMI Audio Processor User Guide Initial system installation Using the default factory settings, the HD621 is optimised for a Meridian system environment. It allows up to six HDMI sources to connect to a Meridian system while supplying HDMI video (and optionally audio) to a display. Be sure to observe the channel allocation correctly. Each socket carries two channels and you should connect the appropriate number of sockets for the maximum number of audio channels to be used.
HD621 HDMI Audio Processor User Guide • The HD621 accepts a maximum input sample rate of 192kHz. • If possible, set the output sample rate of your source to match the sample rate of the content being played. How sources and displays behave The HDMI interconnection system uses handshaking to establish a dialogue between a source and a display. Typically the display signals its capabilities to the source, and the source then generates the highest quality signal it can to meet those capabilities.
HD621 HDMI Audio Processor User Guide Configuring the HD621 You can configure the HD621 using the Meridian Configuration Program, a Windows application that is used to set up Meridian components and systems. For details on how to use it, see its built-in help files. You can also download its User Guide from the Support section of the Meridian Web Site at: Audio The Audio tab is used to define the audio behaviour of the HD621: http://www.meridian-audio.
HD621 HDMI Audio Processor User Guide Property Description Property Description Linear PCM Determines the number of output channels. The options are 8 Ch, 6 Ch, and 2 Ch. This will generally be determined by the capabilities of your system. Note that the HD621 advertises how many channels it wants to receive. For example, in the case that 6 are chosen here and 8 are available from the source, then the HD621 will instruct the player to output the 6-channel version.
HD621 HDMI Audio Processor User Guide Sources Types The Sources tab displays the physical input associated with each logical source and allows them to be assigned: The Types tab shows the Meridian Types stored in the product: Each physical source shows as an icon – in this example there is only one, the BD player, so there is only one icon. However you can assign more than one “logical” source to a physical input. For each source you can also set the Audio Delay to apply a lip-sync delay of up to 85ms.
HD621 HDMI Audio Processor User Guide Operational notes • Some source/display combinations may not return cleanly from “receiver” mode, due to the way in which they handle handshaking. If you do not get the expected result (eg no audio is heard) even after several seconds have elapsed, it may help to switch to another input and then back again. This is not a fault in the HD621; it is a function of how the source and display communicate with each other.
HD621 HDMI Audio Processor User Guide 11
HD621 HDMI Audio Processor User Guide
