M-Audio Fast-Track Pro PCB Pictures

I'm a little annoyed by the limitations of the M-Audio Fast-Track Pro, so I'm thinking about how to mod it. My main grief is the abysmally bad windows drivers that bluescreen constantly under Win7. Then there is the limitation of USB1.1, which does not have enough bandwidth for anything more than 2x24/96 streams. My plan is to make a normal standalone S/PDIF ADC/DAC (2in, 2out, 24/96) out of it.

First, I took a few pictures of the two PCBs inside the unit, and traced a few signals. You can see immediately that the electronic layout of the unit is very tidy!

Main integrated components:

• Texas Instruments TUSB 3200 USB Streaming Controller
• Asahi Kasei AK4114 S/PDIF Transceiver
• Asahi Kasei AK5381 24bit 96kHz ADC
• Asahi Kasei AK4381 24bit 192kHz DAC (compatible successor AK4385)

Misc. Digital

• 74LVC157A, Quad 2-Input Multiplexer
• AT24C64 Atmel 64kBit I2C EEPROM

The phantom voltage generator has a venerable NE555!

OP-Amps

• NJM2115 NRC Dual Operational Amplifier
• NJM3414 NRC Single Supply Dual High Current Operational Amplifier (Headphone Out)

From M-Audio Fast Track Pro

From M-Audio Fast Track Pro

From M-Audio Fast Track Pro

From M-Audio Fast Track Pro

From M-Audio Fast Track Pro

Note: Archlinux and Xorg Keyboard Layout

Archlinux for me seems to miss any magic that takes care of automatically providing the correct keymap to xorg's input driver. To make udev provide the correct settings to xorg, this small udev-rule works.

[root@fbsd ~]# cat /etc/udev/rules.d/99_keyboard_keymap.rules
SUBSYSTEM=="input", ENV{ID_INPUT_KEYBOARD}=="1", ENV{XKBMODEL}="pc105", ENV{XKBLAYOUT}="de", ENV{XKBVARIANT}="nodeadkeys"

So far it's understood by xorg just fine.

[  2888.705] (II) XINPUT: Adding extended input device "Das Keyboard" (type: KEYBOARD, id 8)
[  2888.705] (**) Option "xkb_rules" "evdev"
[  2888.705] (**) Option "xkb_model" "pc105"
[  2888.705] (**) Option "xkb_layout" "de"
[  2888.705] (**) Option "xkb_variant" "nodeadkeys"