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Audio Libraries · Reviewed 26 Oct 2026

BASS

BASS is a cross-platform audio library for software developers.

free tier · un4seen.com ↗

Paid against free › Audio Libraries › BASS

BASS at a glance
34.6KEstimated total trafficModeled monthly visits918Ranking keywordsPublic search sample84/100Technical health15 pages checked0Referring domainsLive backlink summary

Overview

01

Summary

The useful answer before the supporting detail.

BASS is a cross-platform audio library for use in software, providing playback, recording, mixing, and encoding of numerous audio formats S1. It is used by developers to integrate audio features into applications, from music players to games S6. BASS is free for non-commercial use, with paid commercial licenses available S1.

02

Product identity and positioning

Name, category, positioning, audience, and first-party claims.

  • Identity: BASS is an audio library for software developers S1.
  • Core purpose: It provides audio playback, recording, and encoding capabilities for applications S1.
  • Intended users: Software developers integrating audio into their products S1.
  • Product scope: A library, not a standalone application, with add-ons for extended formats and effects S1.
  • Positioning: Focus on quality and efficiency in audio software S1.
  • Claimed distinction: Uses the same engine as XMPlay, known for accurate and efficient reproduction S1.
03

Use cases and audiences

Who the product serves and the jobs it is designed to handle.

AudiencePractical use case
Game developersIntegrate audio features, including 3D sound, into games S6.
Music player developersBuild high-quality audio players for various platforms S6.
Radio broadcastersUse BASS in automation and live-assist software for radio stations S6.
DJ software developersCreate DJ applications with mixing and effects S6.
Karaoke app developersDevelop karaoke players with pitch and tempo control S6.

Features

09

Features and capabilities

Core functions and evidence-backed product capabilities.

CapabilityWhat it does
Audio playbackPlays WAV, AIFF, MP3, OGG, and custom generated samples S1.
Format extensionsSupports additional formats like FLAC, Opus, WavPack, and more via add-ons S1.
MixingMixes multiple audio channels with resampling and matrix mixing S1.
EncodingEncodes audio to MP3, FLAC, Ogg Vorbis, and Opus via BASSenc add-ons S1.
EffectsProvides effects like reverse playback and tempo/pitch control S1.
MIDI playbackPlays MIDI files with soundfonts, including compressed SF2/SF3 S1.
StreamingSupports HLS, Shoutcast, and Icecast streaming S1.
CD playbackRips and plays audio CDs S1.
10

Integrations and ecosystem

Connected products, exports, APIs, and workflow compatibility.

Integration or interfaceTypeWhat it enables
C/C++, Delphi, Visual Basic APIsAPIProvides native APIs for multiple languages S1.
.NET APIAPIEnables use from .NET languages like C# and VB S22.
Java APIAPIProvides Java bindings for BASS S1.
Add-on systemExtension frameworkAllows dynamic loading of plugins for additional formats and effects S1.
BASSencAPIEncodes audio channels using command-line encoders or system codecs S1.
BASSASIOAPIProvides ASIO hardware/driver support for Windows software S22.
HTTPS supportAPIAdds HTTPS support via OpenSSL for secure streaming S1.

Pricing

11

Pricing and plans

Published plans, free access, trials, credits, and pricing limitations.

Plan or offerVerified price and billingIncludedLimits
FreeFree for non-commercial use S1Full libraryNon-commercial only S1
Shareware€125 one-time per platform S1Unlimited shareware productsProducts must sell for no more than €40 each S1
Single Commercial€950 (iOS/Android: €475) one-time per platform S1One productPer platform S1
Unlimited Commercial€3,450 one-time per platform S1Unlimited commercial productsPer platform S1

Competition

12

Competitive landscape

Domains competing for the same organic search demand.

Sampled competitors

CompetitorFirst-page appearancesSampled queriesAverage positionQueries observed
support.xmplay.com415.8xmplay
vogons.org214.5bassmidi
xmplay.en.softonic.com111xmplay
m.majorgeeks.com112xmplay
documentation.help112bassmidi
kvraudio.com113bassmidi
en.potplayer.org115xmplay
radio42.com115bassmidi
portablefreeware.com116xmplay
purezc.net116bassmidi

Website intelligence — Collected evidence

Customers, testimonials, and first-party review claims

No supporting public-page evidence was collected for this category.

Independent review sources discovered

No links to supported independent review platforms were discovered on the collected pages.

13

AI visibility

Measured ChatGPT and Google AI mentions with cited sources.

AI-assistant referral traffic

  • Estimated current generative-AI referral share: 4.6%
MonthSource
—All AI assistants

Website intelligence — Collected evidence

Site-stated AI capabilities

No supporting public-page evidence was collected for this category.

These are first-party product claims, not independent measurements of AI-search visibility.

14

Marketing opportunities

Actions calculated directly from the collected evidence.

OpportunityRecommended actionEvidence
Striking-distance keywordMove “bassmidi” from position 4 toward the top three.Volume 390 · http://www.un4seen.com/doc/#bassmidi/bassmidi.html
Important pageStrengthen the page already earning search visibility before creating an unrelated page.http://www.un4seen.com/doc/#bassmidi/bassmidi.html · 1 sampled keywords · best position 4
Competitor gapReview the sampled queries where support.xmplay.com appears.4 first-page appearances across xmplay
Technical priorityMissing page titlehttps://www.un4seen.com/doc/bass/bass.html

Website intelligence — Collected evidence

Website evidence gaps

  • pricing: no usable public page was collected; verify whether the site publishes this evidence.
  • features: no usable public page was collected; verify whether the site publishes this evidence.
  • integrations: no usable public page was collected; verify whether the site publishes this evidence.
  • customers: no usable public page was collected; verify whether the site publishes this evidence.
  • reviews: no usable public page was collected; verify whether the site publishes this evidence.
  • technical: no usable public page was collected; verify whether the site publishes this evidence.

Trust and proof

15

Customers, proof, and reviews

Published proof, customer signals, and review evidence.

Independent reviews

No citation-grounded independent review links were found.

Customer proof

No named customers, testimonials, or customer case studies were found.

Independent mentions

  • Bass.BASS_StreamCreateFile best practice — For general playback, no flags (BASSFlag.BASS_DEFAULT) will be fine. You may want to use the BASS_SAMPLE_FLOAT flag on Vista/7 systems, as the native sample format is floating-point there. The BASS_STREAM
  • Newest bass.dll — Just FYI, the un4seen site BASS developer just posted the latest in a series of revisions to the "official" 2.4.13.8 release of bass.dll, version 2.4.13.18 dated 2018-06-28. These "unofficial" versions have been described by the developer as being, and I quote, "... 'in development' updates that are made available between releases--They are still 'release' builds and usually fine for production use." Following that definition, and Steven's past statement that manually updating BASS libraries bet
  • BASS VB 6.0 help — mkmr, It works great and plays the Music looped. Exactly what I wanted.I am now adding a "About" form.If only I could get the about form properties that when the user clicks on Form1 that it will return to play the same sound that the about dialog in
  • BASS — audio library for use in software on several platforms. Its purpose is to provide developers with powerful and efficient sample, stream (MP3, ... generated, and more via OS codecs and add-ons), MOD music (XM, IT, S3M, MOD, MTM, UMX), MO3 music
  • Using ffmpeg with BASS — Does that mean the encoder is expecting the input to be MP3? If so, that may be the problem - BASSenc will be giving it WAV data ... uses the automatic DSPs system by default to send sample data to the encoder. So when setting the FLOAT_DSP option,
  • BASS showcase — .net/bassmididrv/ REPORT The BASSMIDI SoundFont Compatible MIDI Synthesizer Driver is a freeware SoundFont based Windows MIDI system driver (created by Kode54 and MudLord) for Windows XP, Windows Vista, and Windows 7. It uses the BASS and BASSMIDI audio
  • DelphiFMX-BASS, all platforms supported by FireMonkey framework — I made another post here http://www.un4seen.com/forum/?topic=19384.0 but it seemed to go un-noticed You will find Delphi-BASS there. It is newer and more capable than DelphiFMX-BASS as it supports both
  • BASS for Universal Windows Platform (UWP) — .zip These add-ons are also available: www.un4seen ... mode) is used for playback and recording. Media Foundation codecs are available in UWP and are supported by BASS, adding support for AAC/MP4 and WMA

External links were grounded in one live web search. Search snippets are leads, not independently scraped page content; rejected links remain available in Review evidence.

16

Company, security, and trust

Ownership, policies, security signals, and public trust evidence.

SignalFindingSource
Company and ownershipNot published on the collected pages.—
Contact and supportPrefer to use your email client? support@un4seen.comsource
Legal and privacyNot published on the collected pages.—
Security and complianceNot published on the collected pages.—
Uptime and status pageNot published on the collected pages.—
Domain registered1999-11-01—
Domain expires2027-11-01—

Not found on the collected pages: company and ownership, legal and privacy, security and compliance, uptime and status page. This only means Scout did not find it on the pages it read; it says nothing about the company itself.

17

Documentation and product updates

Help resources, product guidance, and visible changes over time.

Resource or updateTypeWhat is availableDate or freshness
Contact and supportSupportPublic contact and support channel. (source)Not dated
BASS DocumentationDocumentationDocumentation is publicly available. (source)Not dated

Not found in the collected public sources: public roadmap, changelog or release notes, status page, separate help center or knowledge base.

Technical

18

Technical and delivery signals

Delivery model, platforms, API, data ownership, reliability claims and release activity.

SignalFindingSource
Delivery model (cloud, self-hosted, desktop, browser extension)Library for integration into software; not a hosted service S1.S1
Platforms and appsAvailable for Windows, macOS, Linux, Android, iOS, and more S1.S1
API and extensibility (API, SDK, webhooks, MCP, plugins)Provides C/C++, Delphi, Visual Basic, .NET, Java APIs and an add-on system S1 S22.S1 S22
Data ownership and exportNot published on the collected pages.—
Performance and reliability claimsUses small buffers for realtime performance, configurable threading S1.S1
Release activityVersion 2.4.18.3 available; latest builds section S1.S1
19

Measured infrastructure

Domain, certificate, and hosting signals, measured directly.

SignalFinding
Domain registered1999-11-01 — Amazon Registrar, Inc.
Domain expires2027-11-01
First archived2000-10-02 — web archive
TLS certificateSectigo Limited, valid, expires 2026-10-31
Security headersCSP
Headers not servedHSTS, X-Content-Type-Options, X-Frame-Options, Referrer-Policy
Server headernginx
Mail handled bymail.un4seen.com
Nameserversns-478.awsdns-59.com, ns-595.awsdns-10.net

Not measurable: rdap: exceeded the overall budget; wayback: exceeded the overall budget; tls: exceeded the overall budget; dns: exceeded the overall budget; headers: exceeded the overall budget. A gap here means the lookup was unavailable, not that the finding is negative.

20

Technical site audit

A bounded multi-page crawl with page-level issues and URLs.

Scout — Bounded technical crawl

  • Pages crawled: 15 of 15 maximum
  • Technical health: 84/100
  • Critical issues: 1
  • Warnings: 44
  • Notices: 6

Issues

SeverityIssueValueAffected URL
noticeMeta description length should be reviewed201https://www.un4seen.com/index.php
warningPage should have one primary H10https://www.un4seen.com/index.php
warningMissing canonical URL—https://www.un4seen.com/index.php
noticeLow visible word count32https://www.un4seen.com/index.php
warningTitle length should be reviewed4https://www.un4seen.com/welcome.php
warningMissing meta description—https://www.un4seen.com/welcome.php
warningPage should have one primary H10https://www.un4seen.com/welcome.php
warningMissing canonical URL—https://www.un4seen.com/welcome.php
warningTitle length should be reviewed4https://www.un4seen.com/bass.html
warningMissing meta description—https://www.un4seen.com/bass.html
warningMissing canonical URL—https://www.un4seen.com/bass.html
warningTitle length should be reviewed8https://www.un4seen.com/bassasio.html
warningMissing meta description—https://www.un4seen.com/bassasio.html
warningMissing canonical URL—https://www.un4seen.com/bassasio.html
warningTitle length should be reviewed6https://www.un4seen.com/xmplay.html
warningMissing meta description—https://www.un4seen.com/xmplay.html
warningMissing canonical URL—https://www.un4seen.com/xmplay.html
warningTitle length should be reviewed3https://www.un4seen.com/mo3.html
warningMissing meta description—https://www.un4seen.com/mo3.html
warningMissing canonical URL—https://www.un4seen.com/mo3.html
warningTitle length should be reviewed5https://www.un4seen.com/2midi.html
warningMissing meta description—https://www.un4seen.com/2midi.html
warningMissing canonical URL—https://www.un4seen.com/2midi.html
warningTitle length should be reviewed7https://www.un4seen.com/contact.php
warningMissing meta description—https://www.un4seen.com/contact.php
warningPage should have one primary H10https://www.un4seen.com/contact.php
warningMissing canonical URL—https://www.un4seen.com/contact.php
noticeLow visible word count145https://www.un4seen.com/contact.php
noticeMeta description length should be reviewed34https://www.un4seen.com/forum/
warningPage should have one primary H10https://www.un4seen.com/forum/
warningTitle length should be reviewed9https://www.un4seen.com/license.php
warningMissing meta description—https://www.un4seen.com/license.php
warningPage should have one primary H10https://www.un4seen.com/license.php
warningMissing canonical URL—https://www.un4seen.com/license.php
noticeLow visible word count127https://www.un4seen.com/license.php
warningMissing meta description—https://www.un4seen.com/doc/
warningPage should have one primary H10https://www.un4seen.com/doc/
warningMissing canonical URL—https://www.un4seen.com/doc/
warningMissing meta description—https://www.un4seen.com/bass_showcase.php
warningMissing canonical URL—https://www.un4seen.com/bass_showcase.php
warningMissing meta description—https://www.un4seen.com/2midi/
warningPage should have one primary H10https://www.un4seen.com/2midi/
warningMissing canonical URL—https://www.un4seen.com/2midi/
noticeLow visible word count2https://www.un4seen.com/2midi/
criticalMissing page title—https://www.un4seen.com/doc/bass/bass.html
warningMissing meta description—https://www.un4seen.com/doc/bass/bass.html
warningPage should have one primary H10https://www.un4seen.com/doc/bass/bass.html
warningMissing canonical URL—https://www.un4seen.com/doc/bass/bass.html
warningTitle length should be reviewed9https://www.un4seen.com/doc/bass/upgrade.html
warningMissing meta description—https://www.un4seen.com/doc/bass/upgrade.html
warningMissing canonical URL—https://www.un4seen.com/doc/bass/upgrade.html

Crawled pages

StatusTitleH1sWordsResponseURL
200Un4seen Developments03224 mshttps://www.un4seen.com/index.php
200News0119511 mshttps://www.un4seen.com/welcome.php
200BASS1198228 mshttps://www.un4seen.com/bass.html
200BASSASIO151120 mshttps://www.un4seen.com/bassasio.html
200XMPlay1174521 mshttps://www.un4seen.com/xmplay.html
200MO312835 mshttps://www.un4seen.com/mo3.html
2002MIDI119412 mshttps://www.un4seen.com/2midi.html
200Contact0145158 mshttps://www.un4seen.com/contact.php
200Un4seen Developments Forum - Index0172346 mshttps://www.un4seen.com/forum/
200Licensing0127668 mshttps://www.un4seen.com/license.php
200BASS Documentation015215 mshttps://www.un4seen.com/doc/
200BASS showcase15416305 mshttps://www.un4seen.com/bass_showcase.php
2002MIDI Documentation028 mshttps://www.un4seen.com/2midi/
200Missing title0102188 mshttps://www.un4seen.com/doc/bass/bass.html
200Upgrading12036163 mshttps://www.un4seen.com/doc/bass/upgrade.html

This is a bounded Scout crawl. Core Web Vitals and Lighthouse scores are not claimed unless a dedicated performance audit is connected.

21

Search Console and Analytics

First-party search and behavioral data connection state.

Modeled acquisition channels

ChannelEstimated share
direct63.3%
search24.0%
search organic24.0%
search paid0.0%
social2.8%
social organic2.8%
social paid0.0%
referrals5.3%
paid referrals0.0%
mail0.0%
gen ai4.6%
affiliate0.0%
other0.0%

First-party connections

IntegrationStatusData available after connection
Google Search ConsoleNot connectedClicks, impressions, CTR, average position, queries, pages, countries, and devices
Google AnalyticsNot connectedOrganic sessions, engagement, landing pages, conversions, geography, and devices

No first-party Search Console or Analytics numbers are shown until the site owner authorizes the corresponding Google account. Scout traffic model values above are modeled estimates, not private analytics totals.

Limits and method

22

Limitations and open questions

Known constraints and missing evidence from the collected pages.

The collected pages do not mention any competitors. Evidence gaps include lack of detailed company information, security certifications, and uptime status. Open questions remain about support for specific platforms and future roadmap.

23

Sources, method, and limitations

Evidence inventory, collection method, provider use, and constraints.

This report is based on 7 of 9 collected pages from un4seen.com, including product pages, showcase, and forum. Static and browser rendering providers were used; external proof search was complete. Limitations: some pages were not collected, and external review content was not scraped.

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