dspblok Options
The dspMusik 2/8 is powered by an Analog Devices’ SHARC floating point DSP as implemented on a
Danville dspblok DSP module. There are a number of pin compatible dspbloks that will work with the
dspMusik. Historically, the dspMusik has been supplied with either the dspblok 21479u8a or the dspblok
21469+USB. The dspblok 21479u8a supports USB Audio Class 2 and operates at 250MHz. The dspblok
21469+USB does not support USB Audio Class 2. It used the USB port for control only.
The USB audio dspbloks have a companion processor that supports USB Audio Class 2 (UAC2). These are
supplied with Windows device drivers and are supported natively by Apple OS X and Linux.
The latest USB audio dspbloks are the dspblok 21489uac2 and dspblok 21469uac2. These combine the best
features of the previous dspbloks and are now the recommended choices for the dspMusik 2/8. Both of
these products take advantage of XMOS’s late generation XU208 processor that provides the USB Audio
Class 2 support.
dspblok 21469uac2
The dspblok 21469uac2 is powered by the Analog Devices ADSP-21469 operating at 450MHz. It is the most
powerful 4th generation Analog Devices’ DSP. It also includes external DDR2 SDRAM. The dspblok
21469uac2 is the best choice for systems where large FIRs or very long delays are going to be implemented.
This would be likely for large space acoustics applications.
dspblok 21489uac2
The dspblok 21489uac2 is powered by the Analog Devices ADSP-21489 operating at 400MHz. It is almost
as fast as the dspblok 21469uac2 at a lower cost. Since the dspblok 21489uac2 does not include external
SDRAM, it tends to the best choice for small space acoustics applications, for example studio monitors and
high performance consumer loudspeakers. There is still plenty of internal RAM for delay compensation and
moderate size FIRs as well as the ability to process a very large number of IIR filters.
dspMusik™ 2/8 User Manual
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