The -fir factor 2005-06-08 05:28:25 Sorry for the corny title... ^^;I'm currently using Nero's AAC encoder to make some MP4 wrapped AACs.First, I'm using the frontend (aacenc32) and using -quality high -profile LC at 64kbps (CBR).Anyway, by default -fir is set to 128 taps (or 'switched on'), right?It seems that whenever I use FIR filtering, some samples can't be decoded properly on my mobile phone (a K700i).When I use -nofir, all the samples are played back perfectly on my K700i.FYI, it only occurs on certain songs (I've found one apparently).And when using the decoder plugin (for Winamp) from AudioCoding, the song's played back flawlessly. So, rather than 'missing', it was more like 'undecoded' samples on my K700i.(I haven't tried Winamp's own MP4 decoder, and fb2k didn't seem to be bothered by the file too)Btw, other songs that I encoded didn't seem to be affected whether -fir is enabled or not (when played back on my K700i, that is).Is there any technical explanations for this aside from the 'your decoder is fux0red!' response? What could've made the decoder on my K700i didn't decode the few samples of the song?(in case u missed it, I did use the LC profile)I'll post a portion of the song that's "undecodable" later, when time permits.I've tried encoding w/ the Nero suite too.The 'advanced' options include enabling PNS for very low bitrates.What constitutes 'very low bitrates'?From which kbps to which kbps is the range of 'very low bitrates'?Anyway, what does the PNS switch do?Next, is there anyway to turn off FIR filtering when using the Nero suite to encode?Using Batchenc w/ aacenc32 isn't a problem, but if it's possible it'd be great. Btw, w/ the aacenc32 frontend, what does the FIR filter actually do?Does it have any effect on the resulting encodes whether it's turned on or off in terms of quality?Sorry if I asked too much, and thx b4!