iSonics

Avdshare Audio Converter can Free download Opus converter for Mac or Windows version to convert Opus audio files to MP3, AAC, FLAC, AC3, WAV, WMA, OGG, RA, AU, M4A etc.You can find it at http://www.avdshare.com/opus-converter-to-mp3-aac-flac-ac3-wav-wma-ogg

best app for converting FLAC to MP3

This is a really easy to use and flexible application that can handle AIFC formats as well as others. So far, this is the best application I have found for general audio conversion on the fly.

Excellent choice for converting virtually any audio type to another. Polished interface makes it easier to use compared to other audio converter apps. Its not free though.

Although I still use X-lossless decoder for some tasks, I keep coming back to iSonics. The GUI is really clever and easy. Drag files or folders you need to convert, choose the audio format, tweak some settings as you wish and hit the convert button. Thats it. Always delivers superb quality and fast results. Thumb up for being the easiest converter and another thumb up for the nice responsive devs.

The FLAC standard only has 8 approved compression levels. iSonics offers 12 levels. When I asked the developer why, they were rather blunt and told to me to ask the developer of the libavcodec that they use. I received this reply: "Levels 0 to 8 use essentially the same compression settings as the official libFLAC encoder. Put simply, levels 9 to 12 use additional or alternative settings to achieve better compression." Since libavcodec uses compression levels other than the 8 approved levels, they should not be called FLAC, they should be called FLAC Plus, or some other name that differentiates them from FLAC because they aren't technically FLAC. If libavcodec wants to call its 12 levels FLAC then the developers should attempt to have the FLAC standard amended. Therefore it seems iSonics uses a codec that does not adhere to FLAC standards. Who knows what algorithms they use to compress at additional levels? It also seems to be an inferior codec to the libFLAC codec that XLD uses. I found this unfavorable remark about the codec used by iSonics: "Contrary to libavcodec's video codecs, its audio codecs do not make a wise usage of the bits they are given as they lack some minimal psychoacoustic model (if at all) which most other codec implementations feature." I ripped a CD and these are the numbers for the first 5 tracks using different encoding. iSonics FLAC level 8 1. 19.4 MB 2. 17.9 MB 3. 18.9 MB 4. 18.2 MB 5. 19.3 MB iSonics FLAC level 12 1. 19.1 MB 2. 17.6 MB 3. 18.6 MB 4. 18.0 MB 5. 19.2 MB XLD FLAC level 8 1. 19.3 MB 2. 17.8 MB 3. 18.8 MB 4. 18.1 MB 5. 19.3 MB As you can see, iSonics at level 8 creates files 1/10th of a MB or less larger than XLD at level 8, so they are comparable at the same level (XLD is always smaller). But at level 12 iSonics files are only 1/10th to 2/10ths of a MB smaller than XLD. Since the savings created by using libavcodec at level 12 amount to about 1/5 of a MB per file, I'd say the extra levels are irrelevant and you may as well stick with the approved levels. I have over 20,000 FLAC files. 20,000 times .02 MB savings each amounts to 400 MB, which is about one album. While ripping that CD tonight I found another problem with iSonics: It uses the CDDB database to gather track metadata. My disc was not found so I would have had to manually rename all 48 tracks. I opened the disc in XLD and all track names were located in the FreeDB and MusicBrainz databases. It saved me a lot of time and aggravation by ripping with XLD. MY CONCLUSION IS THAT YOU STICK WITH XLD FOR IT'S SUPERIOR CODEC THAT FOLLOWS FLAC GUIDELINES, AS WELL AS ITS SUPERIOR ACCESS TO CD DATABASES.

After I contacted the developer he immediately fixed some problems with the cue-file for flac-files. Now all works here like it should and iSonics is now my favourite in converting music files. It is very fast, stable and runs without problems on 10.9.2. And the results are great! Using the integrated metafile-editor is easy and reduces the work in iTunes for me. A big thanks again to the developer!

Another GREAT version. This version is perfect in every way. It fills my needs for a good and efficient converter.

Needs improvement, especially more options. There is no option to set the compression level for FLAC, and that's a huge problem for me, since I always choose level 8 for smallest file size. I also don't like the selections for choosing the file output location and format: When I set it to "convert to same folder as source," it does not do this properly - it SHOULD place the output files in the source folder, but instead it creates a new folder with the artist's name in the source folder, then a subfolder with the album name, and then finally the output files are placed in that folder. It's impossible to name tracks as I usually do with other apps: I want the track number followed by a period and a space, then the track name, like this: 1. Name The closest I can get is one of these formats: 1-Name 1 - Name This means I must waste time renaming every track after conversion. Tracks cannot be added via the context menu. With other apps, I can select some tracks, then right click and choose to open with the app. But nothing happens when I choose to open with iSonics. Therefore I'm forced to either drag files into iSonics, or use the Add button. On a positive note, I have a bunch of wma files that XLD and Switch were both unable to convert (Switch's support confirmed there is a bug), but iSonics was able to successfully convert, although not without problems: After successfully converting one or two wma files, I'd delete them from iSonics and drag one or both into iSonics again to test another conversion, but several times I received an error message: "An exception of class NilObjectException was not handled. The application must shut down." After re-opening iSonics, I was able to add the files and covert, but then it happened again shortly thereafter. Unfortunately, I don't know what level of FLAC they were converted to. There is also no help file or tooltips, and those would be very helpful because this app has options I haven't seen before, such as FLAC options "LPC algorithm" and "search method." Although there's no explanation for how the Merge feature is supposed to work, it was easy to figure out, and worked flawlessly on the two wma files I merged to one FLAC file as a test.

Easy to use and fast converting (uses all available CPU cores when selected in the preferences). Though I only use this for FLAC to AAC it can handle most popular formats too.

Awesome converter with a nice GUI. I use it mainly for making opus files something iTunes does not. Recommended

Nice, but it doesn’t handle CUE files and is not free, like MediaHuman Audio Converter does/is. I wish I’d know about that before I bought iSonics.

I want to buy this but it tells me I don't have permission to write to my new hard drive. I have no problem reading from or copying to it in finder.

This app is great in every way!

Version 1.4.2 is available from the developer’s website (http://www.osxbytes.com/page4/index.html?forcedownload). Don’t know why it hasn’t yet been updated here.

Very nice indeed. I’ve been using the great, free XLD for years, but I never liked its lack of an interface, and its preferences were complicated and unexplained (since it had no Help). iSonics too seems to lack Help, but everything is quite self-explanatory so it’s not missed. It converts faster than XLD too. Though it costs $10, I consider that fair — any more and I’d probably stick with XLD. It could stand the addition of a Clear All button to make it easier to removed finished tracks and add new ones, but overall, it’s a very good app.

This program is getting better after each update! Some features compared to XLD I am still missing, but I'm sure they will come soon. Best of all: it's very stable and fast and the GUI is like a Mac GUI should be. Thank you developers!

I've been using XLD over the years with much joy, but I decided to give iSonics ago to find out if it would bring any speed advantages to my flac->aiff converting. Well it certainly converts fast, possibly faster than XLD (hard to measure for me though) but iSonics did't convert any tags that the flac source files contained (or at least the demo version doesn't). iSonics lacks the possibility to not create a new folder for the converted files and delete the source files upon successful conversion, but that functionality might be easily added to iSonics by the dev. All in all iSonics looks promising to me and I'll keep an eye to its development.

Wow! I am impressed this converter supports encoding to meet the EBU R128 standard! This is mostly found on more expensive applications. Cool stuff.

Great GUI and most of all it is capable to use all available CPU power. It manage to convert a big folder with +100 files a lot faster compared to Max on my i7. That only is worth the low asking price! 5 golden stars.