Sound Recording Solutions
Sound Card Recorder
Powerful voice activated microphone recorder for Windows. Click here to learn more.SPDIF
S/PDIF or S/P-DIF stands for Sony/Philips Digital Interface Format, also IEC 958 type II, part of IEC-60958. It is a collection of hardware and low-level protocol specifications for carrying PCM stereo digital audio signals between devices and stereo components. S/P-DIF is a consumer version of the standard known as AES/EBU; it provides small differences in the protocol and requires less expensive hardware. S/PDIF is primarily used with CD players (and DVD players playing CDs), but has become common on other audio components like MiniDiscs and modern computer audio cards. It is also popular in car audio, where a large amount of wiring can be replaced with a single fiber optic cable, which is immune to electrical noise. Another common use for the S/PDIF interface is to carry compressed digital audio as defined by the standard IEC 61937. This mode is used to connect the output of a DVD player to a home theater receiver that supports Dolby Digital or DTS surround sound. The "S/PDIF" specifications allow several different types of cables and connectors which must match the device being used. Key words for the electrical type are "coaxial" and "RCA jack." The other type is called "optical" with the word "TOSLINK" often used, or less-often, EIAJ Optical. Adaptors do exist to convert the coaxial RCA Jack S/PDIF to the optical TOSLINK S/PDIF and vice versa (though most individual adaptors are one-way only). All require some sort of external power supply. The "optical" version is suitable for several applications because of its immunity to electrical noise. S/PDIF was developed from a standard used in the professional audio field, known as AES/EBU which is commonly used in Digital Audio Tape (DAT) systems and for transmissions in professional studio recording. S/PDIF remained identical at the protocol level, but changed the physical connectors from XLR to either electrical coaxial RCA jacks or optical TOSLINK, both of which cost less and are easier to use. The cable was also changed from 110 ? (ohms) impedance balanced twisted pair to the already far more common (and therefore compatible and inexpensive) 75 ? coaxial cable, using RCA jacks instead of the "F" connector found in cable television. S/PDIF is, for all intents, a consumer version of the AES/EBU format. S/PDIF is used to transmit digital signals of a number of formats, the most common being the 48 kHz sample rate format used in DAT, and the 44.1 kHz format used in CD audio. In order to support both systems, as well as others that might be needed, the format has no defined data rate. Instead the data is sent using Biphase Mark Code, which has either one or two transitions for every bit, allowing the original word clock to be extracted from the signal itself. S/P-DIF is meant to be used for transmitting 20 bit audio data streams plus other related information. It can be reduced to 16 bits by zero padding or to 24 bits by renouncing the extra information. Since the low-level protocol is almost the same, it is described in the AES/EBU article. The only difference is in the "Channel status bit". There is one channel status bit in each subframe, making a 192 bits word each audio block. This means that there are 192/8 = 24 bytes available each audio block. The meaning of the channel status bit is completely different between AES/EBU and the S/P-DIF.
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