Audio Bit Depth - Factbites

Audio Bit Depth - Factbites
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Topic: Audio Bit Depth

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	musiq.com Digital Audio tutorial
		Consequently, a second of digital audio can represent any combination of frequencies, to the limit of both the sampling rate (how many of these amplitudes per second) and the bit depth (how much data represents each amplitude).
		Taking standard CD audio, we have a format which transmits 44,100 samples per second with a bit depth of 16 bits.
		Starting with the bit depth, a 16 bit byte can represent numbers from 0 to 2^16 (65536).
	www.musiq.com /recording/digaudio (340 words)

	BatchAudio - Batch Audio processing for audio professionals
		BatchAudio allows any bit depth to be specified up to 32 bits with storage in either 16, 24 or 32 bit fixed point containers.
		Bit depth and rate conversion ratios are calculated on a per file basis, allowing normalisation of disparate bit depths and rates to a single bit depth and rate in one batch process.
		You simply choose the conversion settings you require, possibly opting to leave the original bit depth or sample rate unchanged, select files from the list to convert, then hit the Convert button.
	www.seeyou.force9.co.uk /products.html (340 words)

	Section Three
		If we look again at the figure showing the digital audio recording, we see that the accuracy of the amplitude measurement (the vertical axis) is determined by the bit-depth at which the hardware operates.
		As was discussed in the opening lecture, the bit-depth and sample rate at which an audio card can record determines the accuracy of the digital recording.
		The bit-depth determines the accuracy with which each sample is taken.
	msp.sfsu.edu /DMT/section3/Ch.3.audiocap.html (1020 words)

	Cakewalk Support - Tips for Using SONAR and 24-bit Audio Projects
		must select 24 in the File Bit Depth list, or else the data received from your soundcard will be truncated and stored in your project file as 16-bit samples, defeating the benefits of your card’s higher-bit-depth capability.
		You may choose a File Bit Depth of either 16- or 24-bits.
		Choose a File Bit Depth of 24 if you intend to use your soundcard at 18-, 20-, or 24-bit depth:
	www.cakewalk.com /support/docs/24bittipsold.asp (1020 words)

	What does the bit depth and sample rate refer to? Dolphin Music
		Audio recorded at a lower bit depth will sound grainy and less defined therefore recording audio at 24 bit will be of a higher quality than something recorded at 16 bit.
		If we were to record at 24 bit then we would have over 16777216 levels for a slice of audio frozen in a single moment of time.
		If something is recorded at 24 bits then it is using more bits in a file and as such the files are going to be much bigger.
	www.dolphinmusic.co.uk /d2/page/shop/news_story/a/news_id/e/120 (1020 words)

	Principles of Digital Audio
		Audio files come in a variety of types, which can influence their bit depth, multi-channel organization, compression scheme, sampling rate, organization of bytes high to low or visa versa (called 'Endian-ness') and amount of non-sample information stored in an area called the header in units called chunks.
		Digital audio editing programs can often use 20-bit, 24-bit, even 32-bit floating-point or long integer samples to minimize fractional values and the noise introduced when mixing or engaging in other mathematical processes on the samples.
		Audio files, which are the storable and editable collection of samples organized in a standard form, can be stored on computer drives, transferred to other computers or samplers, shared on the Internet to be downloaded or played-back in real-time.
	www.indiana.edu /~emusic/digital_audio.html (1020 words)

	MP3 - Unipedia
		Compression efficiency of lossy compression encoders is typically defined by the bit rate because compression rate depends on bit depth and sampling rate of the input signal.
		Audio in MP3 files are divided into frames (which have their own bit rate) so it is possible to change the bit rate dynamically as the file is encoded.
		Compression ratios for this reference is higher, which demonstrates the problem of the term "compression ratio" for lossy encoders.
	www.unipedia.info /MP3.html (3666 words)

	EMAGIC LOGIC AUDIO PLATINUM 4.15 (MAC/WIN)
		Next in line after Logic Audio Platinum is Logic Audio Gold ($499), which has all the same MIDI features as the Platinum version but is a bit slimmed down in the audio department.
		Due to that fact and to the depth of its features, Logic Audio has developed a reputation for being hard to learn.
		AUDIO PROWESS Although nondestructive audio editing, such as cutting and pasting Audio Objects, can be handled from the Arrange window, destructive editing chores are the province of the Sample Editor, a full-featured waveform editor (mono or stereo) that you access by double-clicking on any audio track.
	emusician.com /mag/emusic_emagic_logic_audio_2/index.html (3637 words)

	Sonikmatter: Sonikmatter Community -> A 62m - 24 bit recording under OS X Jag
		i tried simply using Logic to configure it, selecting "20/24 bit recording" in the Audio Hardware/Driver panel, but no go according to the unit's indicators (Logic reports the recorded files as being 24 bit, but they are not being converted to that depth by the interface, apparently).
		i am having an impossible time getting the A62 m to record at 24 bits using Logic Audio 6.3 in OS 10.2.8 - after using it successfully in 9.1 for a long while.
		it's recognised, and configurable, and when i start Logic up the indicator lights all light up 24 bit...
	community.sonikmatter.com /forums/index.php?showtopic=7642 (3637 words)

	RipEditBurn - Wave & MP3 editor, copying LP records & tapes to CD
		You then have full control over the audio using all the most common editing tasks, allowing you to cut, copy, and paste audio; crop out unwanted segments; mix files together; adjust sampling rate and bit depth; add effects such as echo, EQ, chorus, flange, and reverse; and more.
		Conversion between different types of audio (for example, 8 to 16 bit)
		RipEditBurn lets you record your own audio CDs that can be played back in any standard CD player (car, home stereo, portable unit, computer, etc.).
	www.blazeaudio.com /products/ripeditburn.html (1070 words)

	Workin' Man Audio! API Power Wedge
		While the Power Wedge did bring about noticeable change to depth and layering of the soundstage, I yearned for a bit more of the air and bloom that I hear when using the TAD Systems Power Purifier.
		The 116 is used on the audio side only, the 113 on the video and audio for video, and the MondialMagic is used to isolate the cable TV ground from the house current ground.
		The ultimate goal in cleaning up the incoming AC power, is to filter EVERYTHING that is in any way, shape, or form, connected to the power that feeds your audio (and now video) systems.
	www.soundstage.com /wrk_api.htm (2030 words)

	Audio Glossary - Blaze Audio
		The bit depth is the level of detail at which a computer samples analog audio to create digital audio.
		Digital audio is audio that has been converted into a series of ones and zeros that can be understood by a computer.
		A method of delivering audio from the internet to your media player that allows you to play the audio as you are downloading it, rather than waiting for the entire file to finish downloading.
	www.blazeaudio.com /glossary.html (2030 words)

	Audio Glossary - Blaze Audio
		The bit depth is the level of detail at which a computer samples analog audio to create digital audio.
		Digital audio is audio that has been converted into a series of ones and zeros that can be understood by a computer.
		A method of delivering audio from the internet to your media player that allows you to play the audio as you are downloading it, rather than waiting for the entire file to finish downloading.
	www.blazeaudio.com /glossary.html (2489 words)

	Digital Audio Explained
		In his conclusion, Nika unearths many of digital audio's little secrets having to do with bit-depth, sample frequency, dither, and emerging technologies such as DSD.
		No corner of digital audio is left unturned, from the basics of digital sampling and issues regarding Nyquist to the circuit design of A/D converters, word clock generators, and PLLs.
		Digital Audio Explained: For the Audio Engineer is a unique book written for all audio engineers at all levels.
	www.cadenzarecording.com (202 words)

	[music-dsp] sound card for laptop with lower cutoff less than 1Hz ? [OT]
		As far as your specific example goes, the ratio of increase in sampling rate to allowable decrease in bit depth depends on the implementation, and what kind of noise shaping is done.
		You get 2 bits of resolution because the possible results for averaging four binary (0 or 1) values are: 0,0.25,0.5,0.75, and 1.
		In other areas where the required output sampling rate is higher, it is not (yet) practical to run at large oversampling ratios, so more bits are used in the front end (and lots of research is done on noise-shaping algorithms!).
	shoko.calarts.edu /pipermail/music-dsp/2002-May/015803.html (736 words)

	[music-dsp] Questions regarding Digital Audio Amplitude with respect to Bit depth
		A deeper track bit depth does no harm even with 16 bit audio i/o hardware, except higher bit resolutions have lower maximum track counts.
		Modern computers are fast enough that you can get more tracks than you can sanely mix even at higher bit depth.
		Such digital rounding noise is very low in 16 bit audio, and virtually imperceptible in 24 bit audio.
	shoko.calarts.edu /pipermail/music-dsp/2002-August/017406.html (844 words)

	16 vs. 24 bit Audio Recording Demystified
		Today, your audio interface is probably 24 bit and allows you to select sample rate of your choice, 44.1, 48, 88.2, 96 and even 192khz.
		We are going to talk about bit depth and sample rates, how these translate into storage requirements, and then talk about the subjective differences between the two methods of recording your music.
		My advice is to record at 24 bits/44.1 at minimum and go up to a sample rate of 88.2 or 96 if you think your material warrants it (and you have the disk space).
	www.tweakheadz.com /16_vs_24_bit_audio.htm (844 words)

	Adding Audio Effects with Premiere 6.5
		This alters the phase of the audio at its center frequency and sounds like the Chorus effect but can be a bit "wavy." It has three of Chorus's four controls.
		In this case, Feedback (how much of the delayed audio is added back to the original audio) is very similar to Mix, and Delay Time is self-explanatory (same as Depth in the Chorus effect).
		Figure 10.12 Multitap Delay is the most complex of Premiere's standard set of audio effects.
	www.informit.com /articles/article.asp?p=29965&seqNum=3 (639 words)

	Wave Editor and Powerful audio editing software
		Wave Creator will even let you adjust sampling rate and bit depth and mix multiple wave files together.
		Now using a wave file editor to work with your music and audio is as easy as editing text - cut, copy, paste, and crop the audio until it sounds right to you.
		That means you can use the microphone to record your voice or other sounds, explore the different options that plug into line-in, such as tape decks and turntables, or even convert MIDI to wave if your soundcard supports that.
	wavecreator.com /store/wavecreator/editor_features.html (434 words)

	Audio Book
		Chapter two illustrates the practical applications of acoustics (how sound waves are created and dispersed through the air) and digital audio theory and covers a broad range of key audio terms such as frequency, decibels, amplitude, sample-rate, bit-depth, dynamic range, and more.
		The book is an invaluable resource for web developers looking to integrate high quality professional audio into their web productions.
		If you are integrating audio into your Web site for the first time, you will want to read this chapter to get an overview of the most popular formats.
	www.raspberrymedia.com /audio/audio_book.html (775 words)

	16 vs. 24 bit Audio Recording Demystified
		We are going to talk about bit depth and sample rates, how these translate into storage requirements, and then talk about the subjective differences between the two methods of recording your music.
		A person who really knows and works with their gear can deliver greater sound quality at 16 bit with lesser gear than a person who just plugs in and goes on top of the line 24/96 recorders.
		This brings us to the Bit Rate, or how much data per second is required to transmit the file, which can then be translated into how big the file is. Your CD is 16bit, 44.1 so that is 44,100 slices, each having 65,536 levels.
	www.tweakheadz.com /16_vs_24_bit_audio.htm (775 words)

	projectÂ´s bit rate
		sonar automactically switched the original sample rate and bit depth of the project.
		Older projects at different bit rates do seem to be retained in the project.
		Because Sonar "checks" the sound card when it starts to make sure it can do the default sample rate you have to go to audio options and change it to the sample rate of the project you want to work on.
	forum.cakewalk.com /tm.asp?m=420448 (1013 words)

	RipEditBurn - Wave & MP3 editor, copying LP records & tapes to CD
		You then have full control over the audio using all the most common editing tasks, allowing you to cut, copy, and paste audio; crop out unwanted segments; mix files together; adjust sampling rate and bit depth; add effects such as echo, EQ, chorus, flange, and reverse; and more.
		You can then save your finished audio to the MP3 or export in WMA and RealAudio formats, or send it to the burning module if you want to create a CD.
		RipEditBurn lets you record your own audio CDs that can be played back in any standard CD player (car, home stereo, portable unit, computer, etc.).
	www.blazeaudio.com /products/ripeditburn.html (1013 words)

	FileForum Blaze Audio RipEditBurn
		Our powerful wave editor gives you complete control to cut, copy, and paste audio; crop out unwanted segments; mix files together; adjust sampling rate and bit depth; add effects such as echo, chorus, EQ, and more.
		Blaze Audio RipEditBurn allows you to rip from music CDs, convert to and from MP3, edit MP3 and wave files with great features like fade and volume normalization, and then burn your own custom music CDs.
		RipEditBurn integrates these features so you don't need to learn three or even four separate programs for ripping, converting, editing, and burning.
	fileforum.betanews.com /detail/Blaze_Audio_RipEditBurn/1013504604/1 (1013 words)

	Waves Education: An introduction to Digital Audio Workstation
		On the silent side of digital music, there is the problem of bit depth.
		The fact is that the current evolution in Digital Audio Engineering travels so fast that an investment in a dedicated hardware box seems to be a luxurious one, but not wise.
		Once properly digitized, all major audio production can be done in a digital environment, with the top of the analog quality as a starting point.
	www.waves.com /german/htmls/edu/intro.htm (905 words)

	Digital Audio/Sound
		The two key data elements determining the quality of a digital audio recording are the sampling rate and the bit-depth.
		For example, CD quality digital audio samples at the rate of 44,100 times per second (44.1 KHz), and uses 16 bits (2^16 or 65,536 divisions of amplitude) to store each sample point.
		Audio compression (also called psycho-acoustic compression) is a much more sophisticated approach that decreases file size by carefully analyzing the frequency spectrum and (1) removing sounds that fall outside the range of human hearing, and (2) removing sounds that are ‘covered up’ by louder sounds.
	www.umdnj.edu /idsweb/idst3400/audio.htm (1357 words)

	musiq.com Digital Audio tutorial
		Consequently, a second of digital audio can represent any combination of frequencies, to the limit of both the sampling rate (how many of these amplitudes per second) and the bit depth (how much data represents each amplitude).
		Digital audio is a stream of bytes which contain amplitude (volume) data.
		With a sampling rate of 44,100 hz, you might wonder why CD audio is only capable of frequencies up to 20,000 hz.
	www.musiq.com /recording/digaudio (340 words)

	MC44BC374T Product Summary Page
		The modulation standard is chosen using a control bit that selects between System L and System B/G. The picture-to-sound ratio may be adjusted using the bus.
		In addition, an on-chip video test pattern generator can be switched ON with a 1 KHz audio test signal.
		Fixed video modulation depth (80% in PAL and 90% in SECAM)
	freescale.com /webapp/sps/site/prod_summary.jsp?code=MC44BC374T&... (340 words)

	Sound Blaster Gifts and Gadgets
		Advanced Resolution 24-bit DVD-Audio Playback DVD-Audio offers 5 times the audio detail of CD audio in 24-bit/192kHz stereo and 24-bit/96kHz in 5.1 surround.
		Experience concert quality audio with 24-bit DVD-Audio playback The only available external PC platform for 24-bit DVD-Audio playback on the Notebook and PC.
		Experience compelling music playback in pristine audio quality, clarity, and depth.
	www.ohfta.ca /1622-Sound-Blaster.html (340 words)

	Compact disc - Encyclopedia, History, Geography and Biography
		This is because computer software could be rendered non-functional by a single incorrect bit, which is not the case for audio data.
		In broad terms the format is a two-channel (four-channel sound is an allowed option within the Red Book format, but has never been implemented) stereo 16-bit PCM encoding at a 44.1 kHz sampling rate.
		An error-correcting code is included with Red Book audio to deal with small scratches or defects on the disc media.
	www.arikah.net /encyclopedia/Compact_disc (5050 words)

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Topic: Audio Bit Depth

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In the News (Tue 22 Dec 09)