enima Posted January 8, 2006 Report Share Posted January 8, 2006 i am a nh 700 owner and i have founded a real problem with this codeci wanted to convert mp3 conferences compressed in mono on my hi md but sonic stage convert them in stereo and finnally i have files two time bigger for nothing.sony engineer's are you afraid by the mono?your devices are not goog for audio speechI have dream it..... sony dont make it Quote Link to comment Share on other sites More sharing options...
Syrius Posted January 8, 2006 Report Share Posted January 8, 2006 (edited) Just use Atrac at 66 or 132kbps. Mono SP is only available for real time recording. Besides, since the original signal is mono, you'll get binaural sound even when SS converts it to stereo. Two channels with the same info at the same time.Also, it's not that they are afraid of mono. There's simply no point in developing a mono-only bitrate when 48 or 66 kpbs stereo will do. Besides, if there was a mono codec with coud be therefore 33 or 24 kbps (since it's half of the bitrate needed for stereo) who has the time and patience to record 200+ hours of speech? Edited January 8, 2006 by Syrius Quote Link to comment Share on other sites More sharing options...
ZosoIV Posted January 10, 2006 Report Share Posted January 10, 2006 There's not much to gain in terms of birate reduction by offering a mono mode when joint stereo coding is being used at such low bitrates. To get the same objective quality from a mono stream compared to one using mid/side (MS) frames, you can only drop the bitrate by about another 20%, not half, as MS coding already resulted in about a 30% reduction in bitrate compared to using independent stereo (LR). Thus, a 32kbps (64/2) mono file would at best sound like 48kbps joint stereo, not 64kbps. Things are different when using full stereo - SP mono mode is simply half the bitrate of SP (292/2=146), but results in similar objective quality because SP coding is dual-channel, not mid/side. Judging by how 48kbps ATRAC3plus files already sound, 32kbps mono would be practically useless for anything but audiobooks. With 45 hours recording time at 48kbps, there's not much benefit in offering such a mode, IMO. Quote Link to comment Share on other sites More sharing options...
chriswyatt Posted January 10, 2006 Report Share Posted January 10, 2006 I was quite annoyed that Hi-MD only supports stereo recording, what if you want to use a mono microphone? Also, I remember Sonicstage had some problems using monoural sound-files, not sure if this is still the case, but annoying none-the-less. Quote Link to comment Share on other sites More sharing options...
ZosoIV Posted January 10, 2006 Report Share Posted January 10, 2006 (edited) I was quite annoyed that Hi-MD only supports stereo recording, what if you want to use a mono microphone? Also, I remember Sonicstage had some problems using monoural sound-files, not sure if this is still the case, but annoying none-the-less.There's ways to make a mono mic record on both channels, including plug adapters. Edited January 10, 2006 by ZosoIV Quote Link to comment Share on other sites More sharing options...
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