#audio

Audius as an API — the decentralised music streaming platform, returned as clean JSON, no key. Search tracks, artists and playlists; pull trending tracks by genre and time window; look up a track (genre, mood, bpm, musical key, ISRC, play/favourite/repost counts, artwork and a durable stream URL), an artist (followers, track and playlist counts, bio, location) by id or @handle, an artist's own tracks, and a playlist or album with its full track list. Every track comes with a ready-to-play stream URL and a preview URL. Live data straight from the Audius discovery network. Distinct from mainstream catalogues: Audius is an independent, creator-owned catalogue of electronic, hip-hop and underground music with actual streamable audio — ideal for music-discovery apps, players, DJ tools and Web3 music projects. 8 data endpoints. Authenticated with an x-oanor-key; fair-use rate limits per plan.

api.oanor.com/audius-api

Mixcloud als API – die Heimat von Langform-Audio: DJ-Mixe, Radiosendungen und Podcasts, zurückgegeben als sauberes JSON, kein Key. Durchsuche Cloudcasts, Benutzer oder Tags; rufe ein Benutzerprofil ab (Follower, Hörer, Standort, Bild) und deren Sendungen; erhalte die vollständigen Details eines Cloudcasts – Abspielanzahl, Favoriten, Reposts, Höreranzahl, Audiolänge, Tags und Uploader; lies die Kommentare einer Sendung; rufe die trendenden Cloudcasts für jedes Tag oder jede Kategorie ab; und liste Mixclouds Kategorien auf. Live-Daten direkt von Mixclouds öffentlicher API. Anders als trackbasierte Musik-APIs: Mixcloud besteht aus stundenlangen Mixen, Sendearchiven und Shows – ideal für Musikentdeckungs-Apps, Radio- und DJ-Verzeichnisse, Podcast-Tools und Audio-Dashboards. 8 Datenendpunkte. Authentifiziert mit einem x-oanor-Key; faire Nutzungslimits pro Plan.

api.oanor.com/mixcloud-api

Vinyl-record geometry maths as an API, computed locally and deterministically — the playing-time, groove-length and groove-speed numbers a cutting engineer, pressing plant or audio hobbyist works a record out with. The playing-time endpoint gives a side's maximum time = the number of groove turns ÷ the turntable speed, where the turns = the recorded band's radial width ÷ the groove pitch (the spacing between adjacent grooves): a 12-inch LP with ~85 mm of band at a 100 µm pitch holds about 850 turns, so at 33⅓ rpm that is roughly 25 minutes a side — a tighter pitch fits more time but cuts groove amplitude and so loudness and bass, the classic time-versus-level trade. The groove-length endpoint unrolls the spiral: length ≈ turns × the mean circumference (π × the average of the outer and inner diameters), on the order of 400–500 metres for an LP side, the whole of which the stylus traces once. The groove-speed endpoint gives the linear speed under the stylus = 2π × rpm/60 × radius, so the outer grooves of an LP pass at about 50 cm/s but the inner ones only ~20 cm/s — the cause of inner-groove distortion and why engineers place quieter tracks last. Everything is computed locally and deterministically, so it is instant and private. Ideal for record-cutting and mastering tools, hi-fi and collector apps, and audio-engineering calculators. Pure local computation — no key, no third-party service, instant. 3 compute endpoints. For musical note and tempo maths use a music API.

api.oanor.com/vinyl-api

Acústica de resonador Helmholtz como API, calculada local y determinísticamente. El endpoint de frecuencia calcula la frecuencia de resonancia de un resonador Helmholtz — una cavidad con un cuello, como una botella o una caja de altavoz portada — a partir del área del cuello (o diámetro), la longitud del cuello y el volumen de la cavidad, f = (c/2π)·√(A/(V·L_eff)), añadiendo la corrección acústica de extremo (aproximadamente 0.85·radio para un extremo con brida y 0.61·radio para un extremo libre) de modo que un cuello corto o abierto resuena más bajo de lo que sugiere su longitud física. El endpoint de diseño invierte la relación, V = A·c²/(L_eff·ω²), para dar el volumen de cavidad necesario para sintonizar un resonador o una cámara de silenciador a una frecuencia objetivo. El endpoint de sintonización de puerto dimensiona un puerto de caja bass-reflex (altavoz ventilado) en unidades de audio prácticas — a partir del volumen de la caja en litros y el diámetro del puerto en centímetros da la frecuencia de sintonización para una longitud de puerto dada, o la longitud de puerto requerida para una frecuencia de sintonización objetivo, usando la corrección de extremo de 0.732·diámetro. Los endpoints principales usan unidades SI; la velocidad del sonido por defecto es 343 m/s. Todo se calcula local y determinísticamente, por lo que es instantáneo y privado. Ideal para desarrolladores de aplicaciones de audio, diseño de altavoces, instrumentos musicales, silenciadores y tratamiento acústico, herramientas de bass-reflex y resonadores, y educación en acústica. Cálculo local puro — sin clave, sin servicio de terceros, instantáneo. En vivo, nada almacenado. 3 endpoints. Esto es resonancia Helmholtz; para reverberación de sala use una API de reverberación y para ondas estacionarias en cuerdas y tubos una API de ondas estacionarias.

api.oanor.com/helmholtz-api

Musical timing maths as an API — turn a tempo into exact times. The durations endpoint gives the length of every note value (whole down to sixty-fourth, plus dotted and triplet variants) at a given BPM, in milliseconds, in hertz, and in samples at your sample rate. The delay endpoint is the producer's note-to-millisecond tool: the delay and reverb times for 1/1 to 1/32 (straight, dotted and triplet) so time-based effects lock to the tempo. The bar endpoint gives the duration of a bar for any time signature. The convert endpoint turns BPM into milliseconds per beat (and back) and names the Italian tempo marking — Largo, Adagio, Andante, Moderato, Allegro, Presto and the rest. Everything is computed locally and deterministically, so it is instant and private. Ideal for DAWs and music-production tools, drum machines and sequencers, delay and echo plug-ins, metronomes, and audio apps. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. This is tempo and rhythm timing; for notes, intervals, chords and scales use a music-theory API.

api.oanor.com/tempo-api

Acoustics and decibel maths as an API. The decibel endpoint converts between a linear ratio and decibels, in either the power convention (10·log₁₀) or the amplitude/pressure convention (20·log₁₀), in both directions. The combine endpoint adds sound levels the way real (incoherent) sources combine — by energy summation, so two equal 80 dB sources give 83 dB, not 160 — and can also subtract a known source from a measured total. The distance endpoint applies the inverse-square law to a point source in a free field (−6 dB per doubling of distance) to find the level at a new distance. The wavelength endpoint converts between frequency and wavelength for sound, deriving the speed of sound from the air temperature (or a value you provide). Everything is computed locally and deterministically, so it is instant and private. Ideal for audio engineering and live sound, room and architectural acoustics, noise assessment and environmental monitoring, and physics teaching. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 5 endpoints. This is acoustics maths; for electrical circuits use an Ohm's-law API and for general unit conversion use a unit API.

api.oanor.com/soundlevel-api

Read SoundCloud in real time — no login or key needed. Full-text search across everything or specifically tracks, users and playlists; resolve any soundcloud.com URL to its object; and fetch a track's detail and comments, a user's profile, their tracks, playlists, likes, followers and following, a playlist's detail, and the trending charts by genre. Tracks, users and playlists are addressed by numeric id (from search/resolve). The public web client_id is resolved automatically and refreshed on expiry; every call is live (no cache) and returns the upstream SoundCloud shape, paginated with limit + offset. 16 endpoints. Built for music discovery, artist and audience analytics and audio content aggregation. A SoundCloud (creator audio) data API — distinct from the Music API (Deezer commercial catalog). No upstream key, no cache.

api.oanor.com/soundcloud-api

Internet Archive como API — la biblioteca digital sin fines de lucro de más de 40 millones de elementos de acceso gratuito: libros y textos, audio y conciertos de música en vivo, películas y video, software, imágenes y páginas web archivadas. Busque en todo el archivo por palabra clave con sintaxis completa de campos Lucene (por creador, título, tema, colección y más), filtre por tipo de medio (textos, audio, películas, imagen, software, web, conciertos en vivo) y ordene por descargas, fecha o popularidad de tendencia, obteniendo el identificador, título, creador, tipo de medio, año, recuento de descargas y colecciones de cada elemento; lea los metadatos completos de un elemento, incluida su descripción, creadores, temas, idioma, colecciones, editor, licencia, fechas y tamaño total; enumere los archivos descargables de un elemento con su formato, tamaño, duración y una URL de descarga directa; y busque la instantánea más cercana de Wayback Machine de cualquier página web: el indicador de archivado, la fecha de la instantánea y el estado HTTP, y el enlace de web.archive.org, opcionalmente cerca de una marca de tiempo objetivo. Ideal para investigación, preservación digital, descubrimiento de medios, construcción de conjuntos de datos, recuperación de enlaces rotos y aplicaciones que muestran cultura de dominio público y con licencia abierta. Datos de Internet Archive (archive.org).

api.oanor.com/archive-api

Convert text into natural-sounding speech audio (WAV) in 30+ languages and voices, with adjustable speaking speed, pitch and amplitude. Returns raw audio/wav or base64-encoded JSON — ideal for voice notifications, accessibility, IVR prompts and audio content generation. Fully self-hosted, no third-party voice service.

api.oanor.com/tts-api

Search the Apple podcast directory, fetch podcast details (artwork, genre, feed, episode count) and full episode lists with audio URLs, durations and publish dates — by resolving each show's RSS feed. Great for podcast players, discovery and analytics.

api.oanor.com/podcasts-api

Search millions of tracks, artists and albums and fetch their details — including 30-second audio previews, cover art, durations, fan counts and full tracklists. Powered by Deezer.

api.oanor.com/music-api