Q: What rear panel connections are featured?
A: The ISA 828 has 8 XLRs for connecting microphones and 8 1/4” TRS Jack line-level inputs. There are also 2 25-pin
D-type connectors: one for the analogue outputs and another for sending an external signal to the optional ADC (most
likely if using the Insert switches on the front panel and returning the mic/line/inst signals from additional processing
for digital conversion). Lastly, there are digital connections, if the optional ADC is fitted, and a voltage-switching power
socket to connect to the internal power supply.
ENGLISH
Q: Should balanced connectors be used with the ISA 828?
A: Yes, where possible. Alternatively, if using an unbalanced instrument source, you can connect to the four unbalanced
1/4” inputs on the front panel.
Q: Is there an optional digital input card?
A: No, because the ISA 828 is primarily a ‘front end’ product. In other words, the only devices that are likely to be
connected to the 828’s inputs are analogue sound sources such as microphones, guitars etc.
Q: Why is the 24-bit 192kHz specification important?
A: An A/D converter works by sampling the audio waveform at regular points in time, and then quantizing those values
into a binary number, which relates to the number of bits specified. The quantized signal must then be passed through
a D/A converter before it becomes audible. In simple terms, the D/A essentially joins the dots plotted by the A/D
converter when the signal was first converted to digital. The number of dots to join, combined with how little those
dots have been moved, determines how accurate the final signal will be compared to the original.
The greater the sample rate and bit rate, the more accurate the whole digital process is. So, 24-bit/192kHz performance
will ensure more accurate digital transfer of your audio information compared to the old 16-bit/44.1kHz standards. This
is especially important if further digital signal processing is to be applied to the signal once converted to digital, as any
mathematical operations taking place on the data (as a result of a gain change or dynamic effect process, for example),
may result in quantization and rounding errors. The higher the resolution of the digital data, the smaller the audible
effect of these errors.
Q: How many digital outputs can I use at the same time?
A: It depends on which sample rate you choose.
At 48kHz or lower: 8 AES and S/PDIF + 2 x 8 ADAT™ = max. 32 outputs simultaneously
At 96kHz: 8 AES* and S/PDIF + 8 ADAT™ = max. 24 outputs simultaneously
At 192kHz: 8 AES* and S/PDIF, 4 ADAT™** = max. 20 outputs simultaneously
* Both AES single-wire and split-wire configurations are supported; split wire will obviously reduce the maximum
number of simultaneous outputs.
** ADAT™ SMUXIV supports sample rates above 96kHz, only channels 1-4 are available at 176.4kHz & 192kHz.
Q: When the A/D is used, are my analogue outputs available for use?
A: Yes. The 8 line outputs can run simultaneously with all of the ADAT™, AES or S/PDIF outputs.
Q: Do I need to buy an optional cable to use either of the A/D cards?
A: Yes; Standard Tascam™, Pro Tools™ and ADAT™ optical cables are available from many sources.
17
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals