Neil,
Some MP3 files do drift. The ones that tend to drift are recorded at a lower bit rate.
There are many factors that go into if it happens or not, as you have found some recorders do a very good job with MP3 files.
I have a Sony IC recorder that I use sometimes, I have no problem with the MP3 files from that recorder either.
I do not say all MP3 files are bad, that is not true.
You have to judge the MP3 file on the Powerdirector timeline, if it does or does not have problems.
There is one fault in Powerdirector that happens sometime, you put a MP3 file on the timeline, all you get is a screeching sound. It used to happen often in older versions of Powerdirector.
In all cases of problems with a MP3 file is to convert that MP3 to WAV will solve the problem.
If you search the forum for MP3 you may find a surprising number of posts and problems.
I found 262 hits.
When you see that many problems, you tend to avoid using a problem format.
It has been well documented that MP3 audio is a iffy audio format in Powerdirector.
This message was edited 1 time. Last update was at Aug 12. 2014 18:07
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.