Music Streaming Platform Development

We build the audio delivery layer using adaptive bitrate streaming via CDN -- tracks are encoded at multiple quality levels using FFmpeg and the client switches automatically based on connection speed. The transcoding pipeline produces MP3 at 128 kbps for standard quality and 320 kbps for high quality, plus AAC-LC for mobile clients and ALAC or FLAC for lossless tiers. Adaptive delivery is implemented with HLS (HTTP Live Streaming) for Apple device compatibility and MPEG-DASH for cross-platform clients, with the web player selecting the appropriate protocol at runtime. CDN delivery is configured through Cloudflare or AWS CloudFront with edge caching so audio segments are served from the point of presence closest to the listener -- a user in Tokyo and a user in London both get sub-200ms segment delivery from regional edge nodes rather than pulling from a single origin. Playback start time is optimised via segment pre-fetching so listeners hear audio within seconds, not after a buffering screen. DRM protection uses Widevine L1 (hardware-backed decryption on Android and Chrome) and Widevine L3 (software fallback) for non-Apple devices, and FairPlay Streaming for Apple devices -- enabling DRM-protected delivery across iOS, Safari, Android, and Chrome without a separate pipeline. For lossless delivery, the DRM layer ensures audio cannot be intercepted as unencrypted PCM during decryption.

We build catalog management tools that handle track ingestion, metadata normalisation, artist and album linking, genre tagging, and ISRC assignment. ISRC (International Standard Recording Code) is stored per track and is the identifier used in royalty reporting to ASCAP, BMI, SESAC, and SoundExchange -- if your catalog lacks ISRCs on ingestion, we build a lookup step against the MusicBrainz API to resolve them where possible. Track metadata is stored following the ID3v2 tag standard (title, artist, album, track number, genre, year, BPM, and custom tags), normalised on ingest so the catalog is consistent even when source files arrive with inconsistent tagging. MusicBrainz IDs are linked to artists, albums, and recordings where available, giving the catalog verifiable canonical identifiers that power the recommendation engine and prevent duplicate entries for the same recording. Large catalogs -- tens of thousands to millions of tracks -- are indexed in a search database (Elasticsearch or equivalent) that makes full-text search, faceted filtering by genre, artist, release year, and BPM, and fuzzy matching for misspelled queries fast at scale. Catalog updates, takedowns, and re-releases are handled through an admin interface with bulk upload support and per-track status control. The catalog layer is the authoritative source that feeds streaming delivery, rights enforcement, playlist curation, and discovery features -- changes in the catalog propagate to all downstream systems without requiring separate updates in each.

Rights enforcement in music streaming means checking, at playback time, whether the requesting user has the right to hear a specific track in their territory on their device type. We build the rights engine that stores your licensing rules -- territory availability, device restrictions, and user subscription tier restrictions -- and applies them server-side before the CDN delivers any audio segment. A track licensed for US streaming but blocked in Germany is enforced by checking the user's resolved country against the track's territory permission set before a playback token is issued; the CDN URL is signed and time-limited so it cannot be shared cross-territory. PRO licensing compliance is handled at the reporting layer: every confirmed stream is logged with ISRC, user country, and timestamp in the format required for ASCAP, BMI, and SESAC royalty reporting. SoundExchange reporting for digital performance royalties is generated from the same stream log, formatted to the SoundExchange data delivery specification for sound recording rights holders and featured artists. Rights changes -- new territory deals, expired licences, label takedowns -- are applied through the admin interface and take effect immediately without a platform deployment. Blocked tracks are handled with graceful fallback: the client receives a clear reason code rather than a silent failure, and the playlist skips to the next available track with a user-visible message explaining the restriction.

We build playlist management tools where users create and manage their own playlists, and editorial teams manage curated playlists with scheduled publication and territory restrictions. Collaborative playlists -- where multiple users can add tracks in real time -- are implemented using Redis pub/sub for real-time sync: when User A adds a track, the updated playlist state is pushed to all co-editors and active listeners without a page refresh or polling. Waveform visualisation on the track detail view and in the player is rendered using the Web Audio API -- the waveform data (amplitude values across the track timeline) is pre-computed at ingest time and stored as a compact JSON array, then rendered as an SVG or canvas element on the client, giving listeners a visual representation of the audio structure without requiring real-time audio analysis. For recommendation systems, we build collaborative filtering -- recommending tracks based on what listeners with similar streaming behaviour enjoy -- combined with content-based signals from track metadata (genre, BPM, key, mode, energy, danceability from audio analysis at ingest). For new platforms with limited listening history, content-based recommendations from MusicBrainz metadata and audio feature similarity are the starting point; collaborative filtering is layered in as listening data accumulates. Radio-style continuous playback, related track suggestions, and new release recommendations are built as discrete features so you include what fits your use case and audience.

We integrate subscription billing with Stripe -- monthly and annual plans, free trial with configurable trial length, upgrade and downgrade handling with proration, and automated dunning for failed payments via Stripe's Smart Retries logic. Pay-per-listen and download purchase models are also supported as discrete billing events, charged immediately via Stripe PaymentIntents. The billing layer is directly connected to the rights enforcement engine: a user's active subscription tier is checked server-side at every playback request, so a user whose payment fails and whose subscription lapses is immediately restricted to the free tier or blocked from playback depending on your plan structure -- there is no window where a lapsed subscriber retains premium access. Stripe webhooks notify the platform in real time of subscription state changes (payment succeeded, payment failed, subscription cancelled, trial ending), so access tier changes take effect within seconds of the event rather than on the next daily sync. Revenue reporting shows monthly recurring revenue (MRR), annual recurring revenue (ARR), trial conversion rate, and churn rate by plan type in a dashboard your finance team can use without pulling raw Stripe data. Subscriber counts, new subscriptions, and cancellations are broken down by plan and acquisition channel so marketing and finance have the numbers they need in one place.

We build analytics that track streams per track, per artist, per playlist, and per territory in the format and granularity your rights holders and licensing partners require. A stream event is logged only when a qualifying play threshold is met -- typically 30 seconds of confirmed playback, consistent with ASCAP, BMI, and SoundExchange royalty reporting thresholds -- so stream counts reflect real listens rather than accidental plays or skips. Stream counts feed into the royalty calculation system so earnings are calculated from verified play data per ISRC per territory per period, not estimates. PRO royalty reports (ASCAP, BMI, SESAC) and SoundExchange digital performance royalty reports are generated from the same stream log, formatted to each organisation's data specification, and can be exported on a monthly or quarterly cycle. Platform-level analytics show listener retention curves by track and playlist (what percentage of listeners reach the 30s, 60s, and full-track mark), skip rates by track, playlist completion rates, and new vs. returning listener ratios by acquisition channel. Artist and label dashboards give rights holders access to their own stream data, territory breakdown, and royalty estimates without requiring access to the full platform admin. All analytics data is retained in the time-series event store for at least 36 months to support retroactive royalty audits.