Win7 64bit, EMI A62M USB works - but problem

[AchmedOrgan]

Oldie but goldie : EMAGIC EMI A62M USB works under Win 7 64bit:
- dual boot config (XP + Win7 64)
- plugged in EMI A62M and (important !) connected to its own wall wart
- started XP to load firmware on EMI A62M (win2K drivers)
- rebooted to Win7 64 (green LEDs in A62M lighted further)
- EMI A62M is driven by MS usbaudio
- installed ASIO4ALL, that found this USB soundcard
- worked well in several ASIO applications

Now my problem: I can select "force wdm 16bit" but there's no distinction between in- and output.
The EMI A62M (as many USB 1.1 soundcards) can handle 24bits on its 6 inputs but then allows only 16bit for output.
If I select "force wdm 16bit", it works, if I do not select this, the ASIO application doesn't start playing.
Is there any clue to "force wdm 16bit" only for output ?

[TomP]

Hi
do you have driver for xp for the audiointerface or do you know, where i got on.

About your problem. I ´ve read that the audiointerface is not working with windows 7 because of 64 system. The only possible way is a emulating to 32 system.

It would be great to get an answer from you
By
Tom

[AchmedOrgan]

XP driver: google "emagic a62m windows driver", f.ex.
www.toggle.com/lv/group/view/kl176557/Emagic_A26__A62m.htm
Last version is 1.5 - originaly a Windows 2000 driver which works even (and fine) under XP.

Windows 7 recognises the box when it's formerly loaded with firmware by the XP driver.

On one system, I have to plug in an external wall-wart to keep the firmware, on another system, its kept over the reboot (first XP to load the firmware, then win7-64). Win7 uses the "usbaudio.sys", if the box is running with firmware (green LEDs on).

After that, you can install ASIO4ALL - it recognises all 6 inputs. But there's a problem with the bandwith, under XP, you can select 16bit/24bit differently for in- and output, in ASIO4ALL, I didn't find out how to do this.

So, under XP, I can record with 24bit and play simultaneously with 16bit, under Win7 I can only record with 16bit while playing simultaneously with 16bi.

[LinuxVM]

Hello,

One addition: You don't need to reboot the computer, you can install a Linux VM (does not even need a graphical user interface, just load the kernel) and use USB emulation.

Linux loads the firmware and then when you close the VM the USB driver starts working.

I use VMWare Player like this and it works fine.

But I do have the same problem as you do: I can't switch 16-bit audio to some inputs only and therefore the card runs out of USB 1.1 bandwith :-(. In addition to loading the firmware that was the only "big" functionality of the original Windows driver :-(.

This can only be fixed by adding the feature to ASIO4all, but since ASIO4all depends on the USB driver it might not even be technically feasible. If MSUSB sets and enforces the bitrate/frequence to the same value for all input channels and does not allow disabling them properly, then its "game over"... Too bad it's not USB2 in that case this problem wouldn't exist :-).