AI acapella extractor

Bass Isolator

Upload an audio file to isolate the bass line from the rest of the mix. Hear a free preview of the separated bass track to help you transcribe and learn the part before you download the full audio stems.

Drop a song here or choose a file

MP3, WAV, FLAC, M4A or OGG · up to 10 minutes and 90 MB

Free: 1 song a day, 5 when signed in · full song $0.50

Four steps

How to Use the Bass Isolator

  1. 01

    Upload Your Audio File

    Select your audio file in MP3, WAV, FLAC, M4A/AAC, or OGG format. Make sure the file is under 90 MB and less than 10 minutes long, then upload it directly to the bass isolator tool on our website.

  2. 02

    Wait for the Processing

    Wait while the open-source Demucs htdemucs model from Meta AI research processes the audio on our own servers. A 30-second free preview of your isolated bass and the other four stems will usually appear in about one minute.

  3. 03

    Listen to the Free Preview

    Listen to the 30-second free preview to hear the isolated bass line clearly. If you are satisfied with the separation and want the entire track, spend 125 credits to download the full WAV and MP3 stems to your device.

  4. 04

    Access Your Final Stems

    Once you download the stems, you have seven days to access them before they are deleted from our servers. Open the WAV or MP3 files in your media player or audio software to start learning the bass part.

Free to preview, pay to keep

Acapella extractor pricing: free preview, $0.50 a song

Previewing an acapella is free: 1 song a day without an account and 5 signed in. Downloading it is 125 credits, which is $0.50, and $5 buys 1,250 credits for 10 songs.

  • 1 free song a day without an account, 5 songs a day when signed in
  • A 30-second preview of all five stems every time, before you pay
  • 125 credits ($0.50) to download a whole song: all five stems as MP3 and WAV
  • $5 one-time buys 1,250 credits, 10 songs, with no subscription
  • Credits are only spent when you download

$0.50 per song download

$5 10 songs, one-time

Try it with a song

Bass Isolator Features

Everything you need to know about extracting bass lines from your audio files.

Supported Audio Formats

Upload your audio file directly to the [bass isolator](/) to begin the separation process. The tool accepts MP3, WAV, FLAC, M4A/AAC, or OGG files up to 90 MB in size and up to 10 minutes long. Links to external streaming sites like YouTube are not accepted, so you must have the actual audio file saved on your computer or mobile device to process the track and hear the bass.

Five Stems from One Split

When you process a track, the system does not just extract the bass line in isolation. One single split gives you five distinct audio stems from your original file: the isolated bass, the drums, the vocals, an [instrumental track](/instrumental-maker) which adds the drums, bass, and other elements together, and an other track for all the remaining sounds and instruments in the mix.

Free 30-Second Preview

Splitting the song and previewing the isolated bass is completely free of charge. Every single split plays a 30-second preview of all five stems, starting exactly at the 30-second mark of your uploaded song. If the track you upload is under one minute long, the 30-second preview will simply start from the very beginning of the audio file instead.

Daily Free Limits

You can test the bass isolator without paying anything upfront. You get one free song split a day without even creating an account on the site. If you choose to sign in, you can split and preview up to five songs a day for free, helping you check if the bass line is clear enough to learn before you spend any credits.

Affordable Download Cost

If you want the full song after hearing the preview, downloading the files costs 125 credits, which is exactly $0.50. This single download fee provides you with all five separated stems, including your isolated bass track, in both compressed MP3 format at 320 kbps and uncompressed WAV format at 16-bit, 44.1 kHz for the highest possible audio quality.

Simple Credit System

There are no ongoing subscriptions required to use the bass isolator. A simple one-time [purchase of $5](/pricing) processed through FloatPass adds 1,250 credits directly to your account. This gives you enough credits for 10 full song downloads. Your purchased credits are only spent when you actively choose to download the final stems to your device.

Who Uses the Bass Isolator

Bass Players Learning Songs

Bass players learning a fast or complex song can use the bass isolator to hear exactly what notes are being played. By stripping away the heavy guitars, loud vocals, and crashing drums, you get a clear, isolated bass track. This makes it much easier to transcribe the exact part and practice along with the original timing of the recording.

Music Producers Sampling

Music producers looking to sample a specific bass line can extract it from an existing track for their own projects. Once you isolate the bass and download the high-quality WAV file, you can load the stem into your digital audio workstation, chop the audio up, and build a completely new beat around the extracted bass frequencies.

Cover Bands Rehearsing

Cover bands preparing for an upcoming gig can remove the bass from a track to create a custom [karaoke track](/karaoke-maker) or backing track for rehearsals. The bass player can practice their specific part over the isolated drums, vocals, and other instruments, ensuring they lock in perfectly with the rest of the band before they perform the song live on stage.

Audio Engineers Analyzing Mixes

Audio engineers studying the mix of a commercial track can use the bass isolator to deeply analyze the low-end frequencies. Isolating the bass from the kick drum helps you hear the specific tone, compression, and equalization choices made by the original mixing engineer on the bass instrument without interference from the rest of the mix.

Music Teachers Instructing Students

Music teachers instructing students on bass guitar technique can isolate the bass line of a popular song for a weekly lesson. Sending the isolated MP3 stem to a student gives them a clear audio reference, making it significantly simpler for them to hear the rhythm, timing, and pitch without any distractions from the vocal or guitar tracks.

DJs Creating Mashups

DJs creating custom mashups or remixes can use the bass isolator to pull the heavy bass line out of a dance track. You can take the isolated bass stem and layer it underneath an acapella from our [vocal remover](/vocal-remover), giving you clean audio files to blend together for a unique live performance or recorded mix.

Good to know

Acapella extractor questions and answers

How much does it cost to use the bass isolator?

Splitting and previewing tracks with the bass isolator is completely free. You can split one song a day without an account or five songs a day when signed in. Downloading the full stems costs 125 credits, which is $0.50. You can buy 1,250 credits for a one-time payment of $5 through FloatPass, giving you enough for 10 songs.

What files can I upload to the bass isolator?

The bass isolator accepts MP3, WAV, FLAC, M4A/AAC, and OGG audio files. Your uploaded file must be no larger than 90 MB and strictly under 10 minutes in length. We do not accept links to external sites like YouTube, so you must upload the actual audio file directly from your computer or mobile device to process it.

How long does the bass isolator take to process a song?

When you upload a track to the bass isolator, the 30-second free preview usually comes in about a minute. If you choose to spend credits and download the full stems, a standard four-minute song is fully split into the five separate tracks in about three minutes using the open-source Demucs htdemucs model on our own servers.

What audio formats do I get from the bass isolator?

When you spend 125 credits to download your split track from the bass isolator, you receive all five stems, including the isolated bass, drums, vocals, instrumental, and other. The single download includes both MP3 files at 320 kbps and uncompressed WAV files at 16-bit, 44.1 kHz for the highest possible audio quality.

Do I need a subscription to use the bass isolator?

No, there is absolutely no subscription required to use the bass isolator. You can make a simple one-time purchase of $5 to add 1,250 credits to your account. Credits are only spent when you choose to download a full song, and that $5 gives you enough credits to download 10 complete songs with all five stems.

How long does the bass isolator keep the files I upload?

Your original audio uploads are deleted from our servers after 1 day, and the separated stems are deleted after 7 days. The files you process through the bass isolator are only available to the person who uploaded them. Please remember that users must have the right to process the audio they upload to our tool.

How does the bass isolator handle the free preview?

Every split you perform plays a free 30-second preview of all five stems, including the isolated bass. This preview starts exactly at the 30-second mark of your uploaded song. However, if you upload a song that is under a minute long, the 30-second preview will start from the very beginning of the track instead.

Who do I contact about copyright notices for the bass isolator?

Users must have the right to process the audio they upload to the bass isolator. If you need to submit a copyright notice regarding any files processed on our servers, please send an email directly to contact@stemsplitai.com. We handle all copyright inquiries through that email address and ensure that files are only available to the uploader.