Introduction

Audio DJ Studio API for .NET is a .NET class developed by MultiMedia Soft that makes it easy to add sound playback and mixing capabilities to your applications; thanks to the integration with DirectShow codecs and with the BASS library, both adding decoding capabilities for the most common sound formats such as MP3, WAV, Ogg Vorbis and many others, Audio DJ Studio API for .NET allows creating powerful multimedia applications with stunning playback capabilities.

Audio DJ Studio API for .NET can load different sounds at the same time on different virtual decks, known as "players"; a player can be compared to a physical deck on a DJ console, the place where you put the vinyl/CD to be played. You can create a console with many virtual decks that can simultaneously play different songs on one or more sound cards. The availability of a certain number of players (decks) will enable the container application to mix several songs on different output channels, giving for example the ability to play advertising spots while songs are being played/mixed on different output channels: this is very useful for multi-channel radio stations automation software

Each player can have separate volume, tempo, playback rate, pitch and equalizer settings; each player also comes with a set of embedded and configurable visual feedback components such as VU-meter, spectrum analyzer, oscilloscope and waveform.

An embedded automatic fader can easily mix audio and video tracks loaded inside a playlist with an accurate and configurable fade-in/fade-out.

Derived from the experience with the Audio DJ Studio for .NET Winform component, this API can be used not only for developing Winform or WPF applications but also for developing console applications, Windows services, server-side ASP.NET web applications or any other application not requiring a user interface. Thanks to COM interoperability, the API can be invoked from legacy development environments such as Visual Basic 6 and Unmanaged Visual C++ with our without MFC.

Many tutorials are available to help you beginning your developments with this powerful API.

Brief summary of available features:

Audio playback

Sound effects

Sound generator

Sound composition through the embedded TracksBoard

Music recognition

MIDI

Audio streaming to and from the Internet

Video playback

Protocols and sound cards management

Playlists and sound management

CD management

Graphical features

Tags-related features

Connection to YouTube

Misc features

Supported target systems

Supported .NET versions

Audio playback

•	Playback of the following audio formats:

- AAC and AAC+	- MOD Music	- PVF
- AC3	- Monkey's Audio (APE)	- Speex
- AIFF	- MP3, MP2, MP1	- SVX
- ALAC	- MP4	- VOC
- AU	- Musepack	- W64
- CAF (1)	- NIST	- WAV (2)
- CD tracks	- OGG Vorbis	- WavPack
- FLAC	- OPUS	- WMA and WMV (3)
- IRCAM	- PAF
- M4A	- PCM RAW format

(1) Support for PCM 8/16/24/32 bits, PCM 32 bits floating point, G711 U-LAW, G711 A-LAW

(2) Support for uncompressed PCM and compressed formats whose ACM codec is installed inside the system

(3) Require the availability of Windows Media Player modules on the target PC

•	PCM stream queuing, allowing to play sound streams coming from an external source

•	Playback of sound files from memory buffers

•	Custom encryption/decryption of sounds

•	Integration with Microsoft's Speech API, allowing to apply sound effects and output redirection to the sound stream generated by the SetOutputToAudioStream function of an instance of the System.Speech.Synthesis.SpeechSynthesizer class (requires .NET framework v. 3.0)

•	Support for loading and playing sound files, in all of the supported audio formats, from a ZIP file directly, also when the same is AES encrypted

Sound effects

•	Volume control

•	Volume sliding

•	Pre-amplifier

•	Automatic Fader and volume automation with possibility to design volume fading curves

•

Equalizer

•	Auto-equalization of audio tracks through formatted XML files

•	BPM (Beats Per Minute) detection

•	Beats position detection

•	Tempo, Playback rate and Pitch support

•	Configurable normalization of sound level

•	Reverse playback of audio tracks

•	DirectX Media Objects (DMO) effects

•	Custom DSP effects

•	VST effects

•	Common filters (low-pass, high-pass, band-pass and stop-band)

•	Vocal remover filter

•	Real-time DC Offset removal

Sound generator

•	Pure wave tones

•	Composite or monaural wave tones

•	Binaural and multi-channel wave tones

•	Sliding wave tones

•

Noises

•	DTMF tones

•	Text to speech strings

Sound composition through the embedded TracksBoard

•	Composing of new stereo or multi-channel (up to 7.1) sound files, with extensive visual editing through the embedded Tracksboard, by mixing together audio data taken from the following audio sources:

- Regular sound files stored inside disk files

- The Microsoft Speech API which allows creating audio data from a string of text or from a text file through synthesized voices installed inside the system

•	All sound items added to the composing session are layered, meaning that they can be added, removed and modified before composing the final mix and exporting the same into a destination file on disk using one between the supported audio formats

- AAC and AAC+	- M4A and MP4	- MP3
- WAV	- WMA	- W64
- FLAC	- OGG Vorbis	- OPUS

Music recognition

•

Music recognition through integration with the ACRCloud service, allowing to obtain several info about the recognized song like title, label, date, YouTube ID, ISRC and UPS codes; music recognition can be performed directly on audio and video files or on the audio stream incoming from a WASAPI capture or loopback device.