Operation Manual

Troubleshooting
Korg 1212 I/O 51
English
the external clock source. This is because when audio is recorded into a
digital audio program, the audio files are stored with the program’s current
sample rate setting - even if the real sample rate is different, as in the
example above. This can result, for example, in a file containing 48kHz
data, but marked as 44.1kHz. Avoid this by always making sure that both
the digital audio software and the external source are set to the same
sample rate.
Note that sample rate conversion will not help to repair these files; this will
change the data to play back at the other sample rate, but will preserve the
incorrect speed and pitch. The way to repair these files is to do the
opposite: change the file’s sample rate parameter, while leaving the data
unchanged. Some programs, such as BIAS’s Peak and Digidesign’s Sound
Designer II, allow you to do this easily, by simply typing in a new sample
rate.
No sound from Analog inputs (MacOS)
In Deck, make sure that the Options menu’s Analog Input Level is set to 7.
No audio is recorded (MacOS)
In Deck, are the desired tracks record-enabled? Deck gives no indication
when the transport is in record, but no tracks selected.
Audio dropouts (Windows 95)
As the 1212 I/O transfers data into buffers on the PC, it periodically
interrupts the PC to let it know that a new block of recorded samples is
ready and that it has read a block of playback samples. If these interrupts
are held off for too long, the playback buffers will not be refilled with
playback samples, and the recorded samples will be overwritten before
they are read.
To track this down, determine the IRQ assignments of the 1212 I/O and
other PCI and SCSI devices, using the Device Manager (Control Panel-
>System-> Device Manager). Try giving the 1212 I/O a higher priority IRQ
than the other devices. IRQ priorities, from highest to lowest, are 0, 1, 2, 8 -
15, and finally 3 - 7.
Sometimes, changing IRQs can be accomplished by swapping PCI slots
with other devices. As an alternative, you can manually change
assignments using the Resources tab of the device to be changed under the
Device Manager. In general, swapping slots is preferred over manual IRQ
assignment.
1212 I/O word clock syncs to Word Clock input instead of S/PDIF input
The 1212 I/O’s Word Clock input has precedence over the S/PDIF input.
When the 1212 I/O’s clock source is set to S/PDIF•Word Clock, and a valid
word clock is received at the Word Clock input, it will be used instead of
the S/PDIF input.