If you want to, you can use VLC for this. Sent from my iPhone
> On Mar 23, 2015, at 9:23 AM, 'Chris Blouch' via MacVisionaries > <macvisionaries@googlegroups.com> wrote: > > Depends on the settings. The audio quality will definetly be worse but for > spoken material it may be acceptable. On MP3s there is sample rate and bit > depth. Bit depth changes how much dynamic range or the range of loudness that > can be recorded. CDs are 16-bit but you could drop an mp3 to 8-bit. The > audiophiles would insist on 24-bit. The bit rate is how many of these 8, 16 > or 24 bit samples are made each second. Generally more is better. CDs use 44k > (thousand) samples per second but you can get away with a lot less for spoken > word. Of course the audiophiles would want 192K sample rates but depending on > your requirements 8K might suffice. Generally the highest frequency you can > record is half your sample rate. With most people's hearing limited to 20KHz > or less the 44K sample rate of CDs is plenty high to capture the highest > frequency sound. Of course if you are recording dog whistles (23-54kHz) then > you'll need a higher sample rate :) Generally mp3s, unless you are doing some > kind of variable bit rate encoding, are the same data rate no matter what > source material you are encoding. If you do a 16-bit recording at 22K samples > per second then it's going to crank out 44K of data per second. > > CB > >> On 3/21/15 10:19 PM, David Chittenden wrote: >> Incoding an MP3 file using MP3 will cause a larger file. >> >> David Chittenden, MSc, MRCAA >> Email: dchitten...@gmail.com >> Mobile: +64 21 2288 288 >> Sent from my iPhone >> >>> On 22 Mar 2015, at 12:55, jeffrey greene <greenebo...@gmail.com> wrote: >>> >>> Hi, The books are already in mp3, I just want to decrease the file size to >>> save hard drive space. Will your itunes process do this? >>> Thanks, Jeff >>> >>>> On Mar 21, 2015, at 7:33 PM, george b <gbma...@gmail.com> wrote: >>>> >>>> It the audio book is in your iTunes just go to the list of books like the >>>> list of songs. Then interact with the list and arrow donw to the book. >>>> Then do a right click on the book, (v o shift m). in the menu that pops >>>> up errow down to change to mp3 and hit enter and follow the prompts >>>> >>>> -----Original Message----- >>>> From: macvisionaries@googlegroups.com >>>> [mailto:macvisionaries@googlegroups.com] On Behalf Of jeffrey greene >>>> Sent: Saturday, March 21, 2015 16:20 >>>> To: macvisionaries@googlegroups.com >>>> Subject: mp3 re-encoder >>>> >>>> Hi, I’ve been looking for a program to re-encode mp3’s and reduce the size >>>> of my audio books. I’ve been having no luck either on the web or mac app >>>> store. Everybody recommends something called mp3 quality modifier but when >>>> I download it its a windows program. Anybody have any suggestions? I >>>> downloaded 2 mp3 converter apps from the mac app store but they both >>>> shorten the playback time of the converted file. >>>> Thanks, Jeff >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "MacVisionaries" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to macvisionaries+unsubscr...@googlegroups.com. >>>> To post to this group, send email to macvisionaries@googlegroups.com. >>>> Visit this group at http://groups.google.com/group/macvisionaries. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "MacVisionaries" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to macvisionaries+unsubscr...@googlegroups.com. >>>> To post to this group, send email to macvisionaries@googlegroups.com. >>>> Visit this group at http://groups.google.com/group/macvisionaries. >>>> For more options, visit https://groups.google.com/d/optout. >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "MacVisionaries" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to macvisionaries+unsubscr...@googlegroups.com. >>> To post to this group, send email to macvisionaries@googlegroups.com. >>> Visit this group at http://groups.google.com/group/macvisionaries. >>> For more options, visit https://groups.google.com/d/optout. > > -- > ¯\_(ツ)_/¯ > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to macvisionaries+unsubscr...@googlegroups.com. > To post to this group, send email to macvisionaries@googlegroups.com. > Visit this group at http://groups.google.com/group/macvisionaries. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. 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