LAME

LAME

{{{logo}}}
LAME ain't an MP3 encoder
Developer(s)	The LAME project
Release information
Initial release	{{{released}}}
Stable release	3.96.1
Preview release	3.97b3
Compatibility
Operating system	All
Additional information
Use	Audio encoder/decoder
License	LGPL
Website	LAME website

LAME (Lame Ain't an MP3 Encoder) is the [Hydrogenaudio]] recommended MP3 encoder. It has been developed by the open-source community since 1998, and has become the highest quality MP3 encoder for most purposes.

Some benefits for using LAME:

• Highly optimised presets
• Fast encoding
• CBR, ABR and VBR encoding methods
• Gapless playback with LAME-header compliant decoders
• Exact Audio Copy and CDex support

History

LAME development began around mid-1998. Mike Cheng started it as a patch against the 8hz-MP3 encoder sources. After some quality concerns raised by others, he decided to start from scratch based on the dist10 sources. That branch (a patch against the reference sources) became LAME 2.0, and only on LAME 3.81 they got rid of all dist10 code, making LAME a completely new program-not a mere patch of an existing encoder.

The project quickly became a team effort. Mike Cheng eventually left leadership and started working on tooLAME, an MP2 encoder. Mark Taylor became leader and released version 3.0 featuring gpsycho, a new psychoacoustic model developed by him.

Nowadays LAME is considered the best MP3 encoder at mid-high bitrates and features the best VBR model among MP3 implementations, mostly thanks to the dedicated work of talented developers like Takehiro Tominaga, Naoki Shibata, Darin Morrison, Gabriel Bouvigne, Robert Hegemann, etc. And development is still going on...

Recommended encoder compiles and sources

This list will be kept up to date with the current LAME compiles that are recommended for optimal quality and will keep track of any development compiles released on Hydrogenaudio.

It is suggested that the compiles available here be used with the Recommended encoder settings.

The currently recommended LAME version is

3.97 beta 3

• Download (538 KB - Win32 compile including lame_enc.dll and lameACM)
• Download (342 KB - LameDropXPd: easy to use drag'n'drop LAME frontend for Windows)
• Download (131 KB - Linux x86 static compile)
• Download (192 KB - MacOS X compile)
• Download (Compiles for other operating systems: Solaris, BSD, HP-UX etc.)
• Download (1.3 MB - Lame source code from Lame project page)

Recommended encoder settings

It has been suggested that [[::Recommended LAME|Recommended LAME]] be merged into this article or section. (Discuss)

Introduction

This article describes the Hydrogenaudio recommended settings to be used with LAME for highest quality MP3 encoding.

These settings require LAME 3.94 or later. LAME 3.97beta2 is the recommended version (click here to download).

Avoid using alpha (a) versions of LAME. More often than not those are exclusively for testing purposes. Use them only if you want to help developers with feedback.

Note: The rule of thumb when considering encoding options: at a given bitrate, VBR is higher quality than ABR, which is higher quality than CBR (VBR > ABR > CBR in terms of quality). The exception to this is when you choose the highest possible CBR bitrate, which is 320 kbps (-b 320 = --alt-preset insane), but this produces very large filesizes for very little audible benefit.

Note: all modes and settings mentioned in this topic belong to the specifications of the MP3 standard, and the resulting MP3s should be playable by every MP3 decoder that conforms with the standard. If your decoder or device does not play MP3s produced by LAME, blame the manufacturer or developer, and not LAME.

VBR (Variable bitrate) settings

VBR: variable bitrate mode. Use variable bitrate modes when the goal is to achieve a fixed level of quality using the lowest possible bitrate.

VBR is best used to target a specific quality level, instead of a specific bitrate. The final file size of a VBR encode is less predictable than with ABR, but the quality is usually better.

-V(number) where number is 0-9, 0 being highest quality, 9 being the lowest.

List of recommended settings

Switch	Preset	Target Kbit/s	Bitrate range kbit/s
-b 320	--preset insane	320	320 CBR
-V 0 --vbr-new	--preset fast extreme	245	220...260
-V 0	--preset extreme	245	220...260
-V 1 --vbr-new		225	200...250
-V 1		225	200...250
-V 2 --vbr-new	--preset fast standard	190	170...210
-V 2	--preset standard	190	170...210
-V 3 --vbr-new		175	155...195
-V 3		175	155...195
-V 4 --vbr-new	--preset fast medium	165	145...185
-V 4	--preset medium	165	145...185
-V 5 --vbr-new		130	110...150
-V 5		130	110...150
-V 6 --vbr-new		115	95...135
-V 6		115	95...135
-V 7 --vbr-new		100	80...120
-V 7		100	80...120
-V 8 --vbr-new		85	65...105
-V 8		85	65...105
-V 9 --vbr-new		65	45...85
-V 9		65	45...85

See also Technical data for recommended LAME settings

If you need a predictable bitrate (in a streaming application, for example), use ABR or CBR modes, described below.

ABR (average bitrate) settings

ABR: average bitrate mode. A compromise between VBR and CBR modes, ABR encoding varies bits around a specified target bitrate. Use ABR when you need to know the final size of the file but still want to allow the encoder some flexibility to decide which passages need more bits.

(128 kbit/s ABR: roughly the same filesize as 128 kbit/s CBR)

• ABR Setting tuned from 320 kbit/s down to 80 kbit/s
  • --preset <bitrate>

<bitrate> (desired averaged bitrate in kbit/s) can be any value between 8 - 320 , like eg. 9, 17, 80, 128, 133, 200 etc.

Example: --preset 200

CBR (constant bitrate) settings

CBR: constant bitrate mode. CBR encoding is not efficient. Whereas VBR and ABR modes can supply more bits to complex music passages and save bits on simpler ones, CBR encodes every frame at the same bitrate. CBR is only recommended for usage in streaming situations where the upper bitrate must be strictly enforced.

• CBR Setting tuned from 320 kbit/s down to 80 kbit/s
  • -b <bitrate>

<bitrate> (bitrate in kbit/s) must be chosen from the following values: 8, 16, 24, 32, 40, 48, 64, 80, 96, 112, 128, 160, 192, 224, 256, or 320.

Remarks

The ""--vbr-new"" switch enables the new VBR mode. Lame will encode much faster than the old/default VBR mode. In terms of quality, --vbr-new appears to be better than the old model, but reports of artifacts when using the new model do exist. Despite these possible issues, --vbr-new is currently recommended over the default VBR mode due to both the speed and quality increases afforded by the new algorithm.

Quick Start

Best Quality : 'archiving'

-b 320. This is the strongest setting for MP3, with the lowest risk of artifacts. With the exception of a few situations, quality is rarely better than the highest VBR profiles described below. However, 'archiving' music using a lossy format like MP3 is never recommended – no matter how transparent the resulting files might be. Alternative: Lossless formats like WavPack, FLAC etc. allow true archiving bit for bit like on original CD.

High Quality : HiFi, home or quiet listening

-V3 --vbr-new (~175 kbps), -V2 --vbr-new (~190 kbps), -V1 --vbr-new (~210 kbps) or -V0 --vbr-new (~230 kbps) are recommended. These settings will produce transparent encoding (transparent = most people cannot distinguish the mp3 from the original in an ABX blind test). Audible differences between these presets exist, but are extremely marginal.

Portable : background noise and low bitrate requirement, small sizes

-V6 --vbr-new (~115 kbps), -V5 --vbr-new (~130 kbps) or -V4 --vbr-new (~160 kbps) are recommended for this use. -V6 --vbr-new produces an acceptable quality, while -V4--vbr-new should be close to perceptual transparency.

Very low bitrate, small sizes: eg. for voice, radio, mono encoding etc.

For very low bitrates, up to 100kbps, ABR is most often the best solution.

Use --abr xx (e.g. --abr 80).

Here a trial to get a view, how the perceived listening quality improves with settings/averaged filesize

Hey! What happened to "--alt-preset"?

The revolutionary --alt-preset system was introduced in LAME 3.90; it was replaced by the --preset flags in later versions. Starting with version 3.94, the -V x quality system was introduced, which allows finer control over the desired bitrate; the --preset switches were made into aliases to the corresponding -V flags for the sake of backwards compatibility. There is no difference between the output you get if you use "-V2" or "--alt-preset standard". (Although adding "--vbr-new" is recommended for now, see above for details.)

More encoding options are available under the new system, such as -V1, which provides a level of quality between the old "standard" and "extreme" presets, or -V3, which is between the old "medium" and "standard".

LAME 3.97 features more streamlined command line options, and it's recommended to stick to one of the values described in the text or shown in the tables above. You don't need to worry anymore about quality, settings, arcane combinations of switches, or presets.

For example, the following command lines will all produce the same output:

--alt-preset insane = --preset insane = -b 320 = --preset 320 = --preset cbr 320

(--preset cbr 320 is the exact same thing as --alt-preset insane, etc.)

Setting up EAC for LAME.exe with tagging

Please check this page to see how to configure EAC to use LAME.exe as its encoder.

Additional reading

• More information on LAME
• Forum discussion of the recommended settings
• Forum discussion of the recommended settings (older)
• Credits for the recommended settings
• Previous recommendations (outdated)
• MP3
• Exact Audio Copy

Technical information

It has been suggested that [[::Technical data for recommended LAME settings|Technical data for recommended LAME settings]] be merged into this article or section. (Discuss)

---

It has been suggested that [[::Recommended LAME credits|Recommended LAME credits]] be merged into this article or section. (Discuss)

Credits

Further reading

• Configuring EAC and LAME

External links

• LAME official homepage
• Historical versions of LAME at ReallyRareWares
• Several multiformat listening tests featuring LAME and other encoders.
• RareWares MP3 page
• Discussion of recommended Lame compiles in the Hydrogenaudio forum