Which Audio Codec is Better?

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Which Audio Codec is Better?

When it comes to audio, the codec is the magic behind the scenes that helps you hear your favorite songs and sounds. But have you ever wondered what makes one codec better than another? In this article, we’ll explore the world of audio codecs and find out which one is the best.

What is an audio codec?

An audio codec is a type of software that compresses and decompresses audio files. This process makes the audio smaller, so it can be easily stored and shared on your computer, phone, or online. When you want to listen to the audio, the codec decompresses it so you can hear it in its original quality.

Why are there different codecs?

Just like how you can choose between different types of ice cream flavors, there are different types of codecs because everyone has different tastes and preferences. Some codecs are better for music, while others are better for speech. Some are easy to use, while others are more complex. The choice of codec depends on the type of audio you want to compress, the size of the file, and the quality of the sound you want to preserve.

The most popular codecs

There are many different audio codecs out there, but here are some of the most popular ones:

MP3
AAC
FLAC
WAV

MP3

MP3 is one of the most popular codecs and has been around for over 20 years. It’s a great choice for music because it compresses audio files into smaller sizes while still preserving the quality of the sound. MP3 is also compatible with most devices and players, making it a convenient option for many people.

AAC

AAC stands for Advanced Audio Coding and is a newer codec that was developed by Apple. It’s commonly used by Apple devices, like the iPhone and iPad, and provides better sound quality than MP3 at a lower bit rate. AAC is also used by many online streaming services, like Spotify and Apple Music, to deliver high-quality audio to their users.

FLAC

FLAC stands for Free Lossless Audio Codec and is a popular option for audiophiles. This codec compresses audio files into smaller sizes without losing any quality, making it the perfect choice for people who want the best sound possible. The downside to FLAC is that it’s not as widely supported as MP3 and AAC, so you may need to use special software to play FLAC files on your device.

WAV

WAV is a common codec for professional audio and is often used in recording studios. It’s a lossless codec, which means it doesn’t compress audio files and preserves the original sound quality. However, WAV files are usually much larger than files compressed with other codecs, so they may take up a lot of space on your device.

Conclusion

In conclusion, the choice of codec depends on the type of audio you want to store and share, and your personal preferences. MP3 is a classic and widely supported option, while AAC offers better sound quality. FLAC is the perfect choice for audiophiles who want to preserve the original sound quality, and WAV is used in professional settings. To find the best solution for you, consider your needs and try out different codecs to see which one works best for you. And finally, if you want to enhance the audio quality of your files, you can use Mp4Gain to adjust the volume and improve the sound of your audio files.

It’s important to remember that the audio codec you choose will affect the size, quality, and compatibility of your audio files. So choose wisely, and enjoy the world of audio!

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24 bits vs. 16 bits are there audible differences?

The experiment

The author of the experiment plans to determine if there are audible differences between 24 and 16 bit audio trying to use an objectivist approach.

For this, it selects 3 audio fragments at 96/24, 2 of them edited by the renowned 2L label and a third belonging to the well-known Goldberg Variations performed by Kimiko Ishizaka. Particularly difficult passages are selected for their musical content or dynamic characteristics.

16-bit versions are generated from the 3 original samples, maintaining the sampling rate of 96 khz. Simple dithering is used in the process. In addition, special measures are taken (addition of noise at -140dB, offsets, use of flac compression with more or less efficiency) to avoid that the characteristics of the files themselves could reveal their nature.

The resulting audio files maintain a DR of between 12 and 14, with no evidence of clipping or compression of the dynamics.

The 6 files are arranged so that both versions of each of them are sequentially reproduced, but it is not known a priori if the 16 or 24 bit version sounds first.

In total 140 people participate, who must:

– Determine when one or the other version of each fragment sounds.
– Indicate the degree of certainty with which they have responded.
– Explain if they have used an ABX type comparison tool or similar.
– Provide a series of data, let’s say demographic, including whether they are musicians, have professional experience or not in audio editing and if they regularly analyze equipment.
– Describe the audio equipment used in the tests and indicate their cost.

The test runs for 2 months. Participants are encouraged to take their time.

Participants

Most of the test participants:

– They are men.
– Between 41 and 50 years old.
– They are not musicians (although 22% say they are).
– They have no experience in music production (although 24% do claim to have it).
– They use equipment whose cost is between $ 1,000 and $ 3,000.

The results

– The hit rate is practically 50%. Or what is the same, pure fluke.
– Participants who claimed to be more sure of their answers were not more correct than the rest.
– The group of “musicians” has failed more than the average.
– The group of “audio engineers” has made it a tad better than the average, but without exceeding 55% of hits in any fragment.
– The group of audio equipment analysts has also done worse than the average, but the size of the sub-sample is considered low (8 participants).
– Participants with expensive equipment (44 people with equipment over $ 6,000) did no better than average.
– The use of headphones has not been an advantage.

The conclusions

I translate more or less literally:

In a real study carried out over 2 months in which 140 people have participated and in which high-quality sound samples obtained from digital audio at 96/24 have been used, no evidence has been found that Digital audio with a 24-bit depth could be appreciably differentiated from its corresponding 16-bit versions obtained through Adobe Audition 3 using a basic algorithm (1/2 bit flat triangular dither).