Sound Recording Solutions
Sound Card Recorder
Powerful voice activated microphone recorder for Windows. Click here to learn more.DVD-Audio
DVD-Audio is a format for delivering high-fidelity audio content on a DVD. The first discs entered the marketplace in 2000 and, as of 2006, titles are still being released. It is currently in a format war with Super Audio CD, another format for delivering high-fidelity audio content. DVD-Audio offers many possible configurations of audio channels, ranging from single-channel mono to 5.1-channel surround sound, at various sampling frequencies and sample rates. Compared to the compact disc, the much higher capacity DVD format enables the inclusion of either: Considerably more music (with respect to total running time and quantity of songs) or Far higher audio quality, reflected by higher linear sampling rates and higher bit-per-sample resolution, and/or additional channels for spatial sound reproduction. Different bit-rate/sampling rate/channel combinations can be used on a single disc as well. For instance, a DVD-Audio disc may contain a 24-bit/96 kHz 5.1-channel audio track as well as a 24-bit/192 kHz stereo audio track. Audio is stored on the disc in LPCM format, which is either uncompressed or losslessly compressed with Meridian Lossless Packing. In uncompressed modes, it is possible to get up to 24/48 in 5.1, and 24/192 in stereo. For 5.1 tracks in either 24/88.2 or 24/96 then MLP encoding is mandatory. If no native stereo audio exists on the disc, the DVD-Audio player may be able to downmix the 5.1-channel audio to two-channel stereo audio if the listener does not have a surround sound setup (provided that the co-efficients were set in the stream at authoring). Downmixing can only be done to two-channel stereo, not to other configurations, such as 4.0 quad. DVD-Audio may also feature menus, text subtitles, still images and video, plus in high end authoring systems it is also possible to link directly into a Video_TS folder that might contain Video tracks, as well as PCM stereo and other "bonus" features. The maximum permissible total bitrate for all streams is 9.6 Megabits per second. While, from a purely technical standpoint, the sound resolution of a DVD-Audio recording (sampled at 24-bit/96 kHz) is substantially better than a standard CD recording (which is sampled at 16-bit/44.1 kHz), there is debate over whether or not the human ear can hear the difference[5] and whether the public is concerned enough about sound quality to help DVD-Audio gain market acceptance. Three of the major music labels, Universal Music, EMI and especially Warner Bros. Records, are continuing to release albums on DVD-Audio, however newer titles tend to be released as CD/DVD packages (which usually include the album on both CD and DVD-Audio) or DualDisc (which can contain DVD-Audio on the DVD side of the disc) as opposed to a standalone DVD-Audio disc. In addition, some titles that were initially released as a standalone DVD-Audio disc, such as The Grateful Dead's "American Beauty" and R.E.M.'s "Automatic for the People", have since been rereleased as a CD/DVD package or as a DualDisc. DVD-Audio discs employ a copy protection mechanism called Content Protection for Prerecorded Media (CPPM)[6]. CPPM, managed by the 4C Entity, prevents users from extracting audio to computers and portable media players. Because DVD-Video's content-scrambling system (CSS) was quickly broken, DVD-Audio's developers sought a better method of blocking unauthorized duplications. They developed CPPM, which uses a media key block (MKB) to authenticate DVD-Audio players. In order to decrypt the audio, players must obtain a media key from the MKB, which also is encrypted. The player must use its own unique key to decrypt the MKB. If a DVD-Audio player's decryption key is compromised, that key can be rendered useless for decrypting future DVD-Audio discs. DVD-Audio discs also can utilize digital watermarking technology developed by the Verance Corporation. The 4C Entity also developed a similar specification, Content Protection for Recordable Media (CPRM), which is used on Secure Digital cards. DVD-Audio's copy protection was overcome in 2005 by tools which allow data to be decrypted or converted to 6 channel .WAV files without going through lossy digital-to-analogue conversion. Previously that conversion had required expensive equipment to retain all 6 channels of audio rather than having it downmixed to stereo. In the digital method, the decryption is done by a commercial software player which has been patched to allow access to the unprotected audio. The method is still in early stages, for example having problems with watermarked disks. As the DVD-A format has not gained wide commercial interest or acceptance, decryption tools are still very primitive. The tools are most likely illegal in the United States under the Digital Millennium Copyright Act, and the Recording Industry Association of America has been successful in keeping them off websites. Like much software of dubious legality, they are still distributed from person to person and on the peer to peer networks
Phone Call Recorder
Must have software for voice modem. Record all phone calls automatically, watch Caller ID information, create you own powerful answering machine. Perfect sound quality. Click here to learn more.3d audio effect - 3gp - a-law - aac - acm - adc - aiff - aliasing - amplifier - amr-wb - amr-wb plus - amr - apev2 tag - asf - atrac - audio codec - audio compression - avi - bitrate - bitrate peeling - chord - codec - comfort noise - compact audio cassette - compact disc - compression - compression artifact - compression ratio - contact microphone - container format - dab - data compression - digital audio - digital camera - divx - dolby digital - dolby digital plus - dsp - dvd-audio - dvd - effects unit - equalization - ffmpeg - flanging - fourcc - frequency spectrum - hi-fi - high-end audio - hiln - id3 - joint stereo - laser microphone - line level - lossy - loudspeaker - matroska - mcf - microphone - midi - mixing console - mp2 - mp3 - mp3 surround - mp3 sx - mp3pro - mp4 - mpeg-1 - mpeg-21 - mpeg-3 - mpeg-4 - mpeg-7 - mpeg - mu-law - musepack - music - mxf - nut - osm - parabolic microphone - pcm - perception - phonograph - pink noise - pqf - psychoacoustics - qdesign - quadraphonic - radio receiver - ratdvd - realaudio - red noise - reverberation - rhythm - ribbon microphone - riff - rmvb - sbr - signal processing - sound - sound card - sound effects - sound recording - spdif - speech encoding - speech recognition - speex - stereo - subwoofer - surround sound - synthesizer - tape recorder - tdm - tweeter - video - video compression - vob - voice analysis - vorbis - wav - white noise - wma - woofer