Eventide BD600+ handleiding
Handleiding
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Understanding BD600 Profanity Delay Functions
Page 10 Chapter 1 Introduction BD600+Profanity Delay
Document Version 2.3
input at 44.1kHz. Note that the AES output rate will be that set by SYNC - in this case 48K, meaning that the input
and output AES rates will be different.
Best results with digital inputs, will be normally achieved when the sample rate is set to match the input signal.
Wordclock will often give a more stable sync source than the AES signal.
If either AES or WCLK is selected but does not have a suitable input signal, the display and the DIGITAL input sta-
tus LED will flash, indicating lack of lock (meaning that the BD600+ is unable to synchronize with the signal).
During normal operation outside bypass mode, if the unit is synchronized to AES or WCLK and the signal becomes
unsuitable, the display will scroll NO LOCK. In bypass mode, the displayed bars will flash.
If the sync source becomes unlocked, the system will revert to the configured fallback mode (FLBK). This may be
either MUTE or ANAlog. If ANAlog is selected, during fallback mode the analog input LED will light while the digi-
tal LED will flash.
Notes and Warnings for AES/EBU Operation
The AES/EBU source must be stable before putting the unit in-line. If your AES/EBU source's sample rate
changes, or if the AES/EBU is disconnected, or if the AES/EBU audio source is turned off while the
BD600+ is processing audio (in-line and powered on), the BD600+ may add artifacts to the audio, or may
indicate a failure with an error message (NO LOCK).
The BD600+'s purpose is to store audio and play it back with a delay. If the rate of audio into the unit
changes while audio is stored, the audio played from the delay will change pitch. Thus, if the AES/EBU
source's sample rate changes or stops altogether (cable is disconnected), the BD600+ may play out audio
with a significant pitch shift! If the unit falls back from AES/EBU to analog input at a different sample rate,
there will be a pitch change in the audio already delayed through the unit. Your digital system must be set
very close to either 44100 or 48000 samples per second, or using the fallback option in the BD600+ will
allow several seconds of pitch changed audio to pass.
From the above, it will be clear that when using digital audio on air it is essential that all signals are of suit-
able quality and that a solid lock be achieved. These issues apply to all digital audio connections, not just
those involving the BD600+.
The BD600+ is designed to operate with sampling frequencies between 32K and 50kHz. If SYNC is set to AES or
WCLK and an incorrect sync source of above 50kHz is presented the unit will switch to 48kHz sampling and at-
tempt to sample rate convert the received AES signal to this rate. When it detects that an AES signal below
50kHz is again present, it will return to the original settings.
Using Wordclock
Wordclock is a square wave signal at the sample rate. Typically it is generated by a central timing
source and sent directly to all units with a digital input. Using Wordclock as a sync source in this way
allows tighter synchronization with reduced timing jitter which will maintain the best audio quality
across the installation.
Using Wordclock in a “daisy chain” configuration where it is fed through each piece of equipment de-
feats its purpose, as it will be degraded, however subtly, as it passes through extra circuitry. The best
configuration is where it is generated by a central high quality timing clock and then fed directly and
separately to each unit that requires it.
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Productinformatie
| Merk | Eventide |
| Model | BD600+ |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3523 MB |