MPEG-1 Layer 2 audio streams selection

[Garet_Jax]

I recently received a file with following specification (GSpot 2.51 beta2):

Container:
CDXA << MPEG-1 System Stream << {1 vid, 1 aud }

video codec
type: MPEG1_Payload
name: MPEG-1

audio codec
codec: MPEG-1 Layer 2
Info: 0xc0:44100Hz CBR 224 kb/s total (2 chnls)

It also says that it is an VCD file.

On those two audio channels the file have two different languages. Unfortunately BSplayer shows only (audio -> audio streams):
Stream(C0)

By default it plays both channels, the only way to change this is to go to filters and in MPEG Audio Decoder which is identified as:

MPEG Audio Decoder
Location: C:\WINDOWS\System32\
quartz.dll, Size: 1250304 bytes, Version 6.5.1.902

CompanyName: Microsoft Corporation
FileDescription: DirectShow Runtime.
FileVersion: 6.05.01.0902
InternalName: Quartz.dll
LegalCopyright: Copyright (C) 1992-2001 Microsoft Corp.
LegalTradeMarks: Copyright (C) 1992-2001 Microsoft Corp.
OriginalFilename: Quartz.dll
ProductName: DirectShow
ProductVersion: 6.05.01.0902
Comments: 6.05.01.0902

change options from "channel - both" to "channel - first" or "channel - second" (note: this is translation from polish so it may differ from original)

It would be so cool if there were an option to choose channels as in ogg files. (for example: audio -> audio streams -> Stream(C0) -> first, second, both)
^_^