User manual MERIDIAN AUDIO 565 DTS SUPPLEMENT

[. . . ] Alternatively, you can manually select one of the DTS presets at any time. (See page 18 of the User guide. ) Please note: if you do deliberately select a DTS preset, the 565 will only decode DTS and be silent for all other formats until the preset is changed. DSP parameters The DSP preset parameters for DTS are the same as those for Dolby Digital (AC-3), except for `Compress' which is not a feature of DTS. (See page 40 of the User guide. ) Correct use of the LFE Level control is important with DTS recordings. It is conventional for decoders to boost the LFE signal by 10dB for movie reproduction (this is the expected setting at the cinema). [. . . ] (This same method is used to prevent you playing back CDROMs as audio in a CD player. ) If, for any reason, compressed streams are directly played as audio, the result is a loud hiss. Like Dolby Digital and MPEG, DTS is a compressed (non-PCM) signal. Meridian Audio Limited, Stonehill, Stukeley Meadows, Huntingdon, Cambs, PE18 6ED, England Tel: +44 1480 434334 Fax: +44 1480 432948 Web: http://www. meridian-audio. com Meridian 565 User Manual Supplement for DTS DTS streams on the other hand are not flagged in this way; consequently normal DACs and decoders have no direct method of preventing you hearing the compressed stream as a loud hiss. The Meridian 565 detects the DTS signal and switches to a DTS preset as quickly as it can. However, even the 565 needs a short time to be sure that this really is DTS. So, when you play a DTS LaserDisc you may hear the compressed signal as a short burst of hiss before DTS is identified. As we have explained, this is an unavoidable limitation of the way DTS is delivered, not of the 565. In Version 4. x software we have provided some very useful workarounds, as described in the next four sections. Automatic DTS operation If you want to ignore the short hiss that may occur at the start of LaserDiscs, then you can just use the 565 as before. CDs will always behave well because of the default DTS delay. If you follow this method, the 565 will load one of its DTS presets automatically if a DTS signal is detected. The preset that gets loaded depends on how the source is labelled ­ as described below: · Label is `LD' ­ loads DTS THX · Label is `CD' ­ loads DTS CD · All others ­ loads DTS For example, you can therefore force the 565 to use DTS CD with the CDR source, by re-labelling it CD as described on pages 48­49 of the Installation guide. Pre-loading DTS Manually pre-loading a DTS preset, as described earlier, avoids the hiss. To further assist, we have set up the LP source to automatically load DTS for LaserDiscs. So, if LP is selected before playing a DTS LaserDisc, the DTS preset will be automatically loaded and no hiss will be heard. Obviously the LP source can be re-configured differently if you need it. Using a 562V with the new 565 There is an upgrade to the 562V software, Version 1. 8, which includes a DVD input for video and digital audio, and also supports the LP key for DTS LaserDiscs. Whilst not necessary to enjoy DTS material, it is available from Meridian dealers. DTS Delay There is an additional parameter in the source Config of the 565. (See page 48 of the Installation guide. ) The display will read: `CD DTS Del. This may be set to `Y' or `N'. Setting it to `Y' adds a 32ms delay to the audio for that source. Engaging this delay allows the 565 time to detect a DTS signal before it is played out, and therefore prevents the short hiss occurring as the disc starts playing. Setting DTS Delay to `Y' is the ideal and recommended solution to playing DTS from CD. This setting is not recommended for video sources (such as LaserDisc or DVD) because an additional 32ms audio delay is equivalent to one video frame, and may affect the Lipsync with the picture. (See page 28 of the User guide for an explanation of Lipsync. ) When you Type the 565 (page 20 of the Installation guide), the default settings for DTS Delay are `Y' for CD, Radio and CDR, and `N' for LP, TV, Tape1, Tape2, Cable, DVD, VCR1, VCR2 and LD. Using 518 with the new 565 If you have a Meridian 518 Digital Processor, this will de-jitter a DTS signal for optimum sound quality. However the resolution enhancement features of the 518 are not appropriate as DTS is a compressed digital stream, not standard digital audio. [. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565 Serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dealer who supplied it . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]