Codec Guide

Just checked - works fine win WMP x86.
Any solution for WMP x64 (and Media Center)?

BTW Latest beta fixed problem with x86 players.

Discovered one issue - DC-Bass allow to have only one instance simultaneously. Second instance always silent!

I don't know of any solution for x64.

Please report the multiple instances problem to the DC-Bass developer here:
http://forum.dsp-worx.de/viewforum.php?f=20

I just have got a few recordings from an iPhone. mediainfo reports (properly, I guess):

Code: Select all

General
Complete name                    : I:\20091214 093231.m4a
Format                           : MPEG-4
Format profile                   : Apple AAC audio with iTunes info
Codec ID                         : M4A
File size                        : 72.8 MiB
Duration                         : 33mn 8s
Overall bit rate                 : 307 Kbps
Encoded date                     : UTC 2009-12-14 09:05:45
Tagged date                      : UTC 2009-12-14 09:06:56

Audio
ID                               : 1
Format                           : ALAC
Codec ID                         : alac
Codec ID/Info                    : Apple Lossless Format
Duration                         : 33mn 8s
Bit rate mode                    : Variable
Bit rate                         : 307 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 44.1 KHz
Resolution                       : 16 bits
Stream size                      : 72.7 MiB (100%)
Title                            : Core Media Audio
Encoded date                     : UTC 2009-12-14 09:05:45
Tagged date                      : UTC 2009-12-14 09:06:56

However it won't play in MPC:

Code: Select all

I:\20091214 093231.m4a::Output

Media Type 0:
--------------------------
Unknown

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Stream {E436EB83-524F-11CE-9F53-0020AF0BA770}
subtype: Unknown GUID Name {08E22ADA-B715-45ED-9D20-7B87750301D4}
formattype: TIME_FORMAT_NONE {00000000-0000-0000-0000-000000000000}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 1
cbFormat: 0


Media Type 1:
--------------------------
Unknown

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Stream {E436EB83-524F-11CE-9F53-0020AF0BA770}
subtype: TIME_FORMAT_NONE {00000000-0000-0000-0000-000000000000}
formattype: TIME_FORMAT_NONE {00000000-0000-0000-0000-000000000000}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 1
cbFormat: 0

Letting GraphStudio try to render the file automatically crashes the program. Manually placing DC-Bass Source (as one of the mp4 files earlier in this thread was recognized), it replies with "Cannot load specified file".

Are you sure you enabled the DC-Bass M4A option in the installer? It is disabled by default. You can also activate it with the Codec tweak Tool.

I'm pretty sure I did, since I can play this file:

Karlson2k wrote:Sample:
http://www.filefactory.com/file/a06g332 ... singer_m4a
http://www.filehosting.org/file/details ... singer.m4a

Here is GraphStudio's graph: "DC-Bass source" -> "Default DirectSound Device"

I get the same graph for the file in GraphStudio as well, so I guess this is fine.

My experience is that certain M4A files don't play with the DC-Bass Source filter. Most work fine, but some fail. Possibly due to DRM.

You should be able to play them with QT Lite + MediaLooks QT Source filter.
http://www.codecguide.com/download_other.htm#medialooks

I don't think it has anything to do with DRM since the files were self-recorded with the iPhone acting as a voice recorder. Also, if only random "certain files" were unplayable, it would be somewhat improbable that having three files (recordings) all of them were the "certain files".

As for the source filter. It says in the downloads section of the MediaLooks page that the filter is a "full-featured 30-day trial" (confirm?) so it's a rather time-limited solution. I guess I'll fall back to QuickTime for playing and then maybe re-record it through some virtual sound card into a more "user-friendly" format.