Audio Tools for Maximizing Sound Quality
New and improved tools for maximizing the sound quality of older or newly recorded audio.
DART Pro 24... the complete audio recording, sound quality improvement, and CD burning system that achieves the best results for your audio. You will be amazed by the power and range of the new, enhanced restoration tools and the exceptional audio quality they deliver. Use DART Pro 24 to record from any audio source, or use with existing digital files to clean up and improve even the most troublesome audio problems. Use the included CD burning utility to organize your audio files into custom play lists and burn standard Audio CDs that can be played in any CD player.
Eight Powerful Sound Quality Improvement Functions -
- DART DeClick Plus™ - Elimination of impulsive disturbances and low intensity wide band noise. The tool isolates and reconstructs irrevocably distorted signal samples.
- DART DeCrackle™ - An advanced tool for elimination of impulsive disturbances, based on bidirectional processing of audio signals (it combines results of forward-time and backward-time signal analysis).
- DART NoisePrint™ - A special noise identification function selects a fragment of a recording that contains noise only - a short piece of "silence" preceding or after a recorded signal. Or extract the NoisePrint from another recording.
- DART ReTouch™ - Manual control of DeClick and DeCrackle including replacement and reconstruction of large fragments useful for repairing long-lasting disturbances or dropouts.
- DART DeNoise Plus™ - Elimination of a broadband noise of known characteristics using NoisePrint to identify a specific noise pattern.
- DART MaskNoise™ - Noise suppression tool based on a psychoacoustic model of the human auditory system. MaskNoise identifies noise components of corrupted audio files and divides them into audible and inaudible components, "masked" by the audio signal. Only the audible components are removed.
- DART DeHiss Plus™ - A wideband noise reduction utility based on a standard noise model. Used when a noiseprint is not available.
- DART DeHum™ - Elimination of harmonic disturbances. (Hum and Buzz removal)
New Features -
- 24 Bit 96 kHz processing - All functions and tools work on 16 or 24 bit sound files and any frequency up to 96 kHz. (See below for limitations)
- Batch processing - Process multiple tasks in the background.
- MaskNoise™ - A new wideband noise suppression tool based on a psychoacoustic model of the human auditory system.
- DeCrackle - Remove clicks and pops using automatic bidirectional processing of audio signals for music and speech recordings.
- Split/Join tools - Separate a sound file into multiple frequency components for individual processing.
- Divide/Combine tools - Separate a sound file into different time divisions for individual processing.
- UpSample/DownSample tool - Change the sample rates in a sound file for individual processing.
- Split Frequency processing - Allows all filters and tools to work on different frequency components separately.
- Time Division processing - Allows all filters and tools to work on different time divisions separately.
- Add All tool - Add multiple files to one sound file.
- Combine All tool - Combine multiple files to one sound file automatically aligning the waveforms where the merge.
- Multi-cut tool - Remove a selected fragment from many files.
- MP3 import - Import MP3 files directly.
New Features -
More tools and functions:
- Scale, Maximize, Reverse & Add, Subtract, and Reverse signals.
- Split/Unit channels & Convert to/from Stereo/Mono.
- Editing - cut, copy, paste & multi-cut.
- Smart Editing - cut, mute & crossfade.
- Equalize frequency bands with Gain and Clipping controls.
- Lowpass, Highpass, Bandpass, Bandstop & Notch filters.
- Fade In, Fade Out & Crossfade.
- Resample, Change Speed, Adjust RPM, & Trim Length adjustments..
- Speed Up and Down & Shift pitch modifications.
- Find Pattern, Compare & Mix audio signals.
- Unpack automatically to separate tracks and individual files. (From a silence NoisePrint)
- DeVocal & Reverb. (For Karaoke work)
- Waveforms, outliers, zooming, and 2D & 3D spectral analysis viewing.
- And others…
Processing options -
- Automatic and transparent 24 and 16 Bit sound file support and up to 96 kHz.
- Mono & Stereo.
- Music and Speech.
- Interactive, Batch and Real Time. (See below for limitations)
- Unique processing for each frequency and sample rate.
- Unique processing for each time division options.
- Forward & Reverse processing.
- Set/Drop Markers, Set/Remove frames, Divide/Combine time slices.
- MyFilter & Filter Builder for making custom filters with unique filter & processing combinations.
- DirectX audio plug-in support - use any DirectX plug-in with DART PRO 24.
Records audio from multiple sources - Analog & Digital:
- 78, 45 or 33 RPM records.
- Cassette or reel-to-reel tapes; radio too.
- Extract CD tracks and DAT tape.
- Supports numerous SCSI and EIDE CD-ROM, CD-R and CD-RW devices.
Player controls - lift tracks, add, delete, rename, move, play, pause, loop, etc.
Graphics - See the audio and see the distortions to find and fix -
- 2D & 3D spectral analysis, parametrics, waveforms, outliers, zooming, etc.
- Applications - Who is using the most complete audio restoration & recording system?
- Audio Engineers - Professional re-mastering of music and post production audio quality work.
- Project Studios - Remove and reduce audio distortions from vocal and instrumental tracks.
- Forensics Analysis - Investigative and Evidentiary audio analysis.
- Historians and Archivists - Recovery of historical voice recordings, or lecture tape clarification and amplification.
- School music labs - Teach digital audio, audio science and music history.
- DJs - Music Recovery, Audio improvement, Playlist Construction and Recording.
- KJs - Removal of lead vocal and adding sound affects. (audio prep for Karaoke authoring)
- Music lovers - Restore and Save the music you love from records, tapes, cassettes, and video.
- Record collectors - Music Restoration, Preservation, & Listening.
Minimum System Requirements -
- CPU: Intel Pentium® or equivalent (or faster).
- System Software: Microsoft Windows XP® (Professional or Home Edition), NT®, ME® and 2000®.
- Memory: 16 MB RAM & 1.2 GB Disk (Temp space for writing a CD).
- Sound Card: 16 or 24 Bit Windows compatible (for analog sound recording).
- DVD/CD-R/W Drive: SCSI, USB or EIDE (for writing audio CDs). (Nearly 2,000 different devices)
- DART PRO 24 works with all types of music media and a continuously updated list of DVD/CD-R or DVD/CD-RW devices.
Warning: Attempts to use the restoration functions in real time at 24 bit 96 kHz may be hazardous to your audio health!
Recording at 16 bits and 44 kHz requires 10 megabytes for one minute of audio. Doing the same at 24 bits and 96 kHz requires 35 megabytes per minute of audio. That's 3.5 times as much data. More data in the audio stream requires a corresponding increase in CPU power to process the data in a given time interval.
So what does this all mean? It means trying to run the DART restoration functions in real time is most likely NOT going to work at the higher data rates. Trying to run the DART restoration audio output directly to the sound card or trying to process the audio input stream directly from the sound card is going to result in poor effects with dropouts, gaps and other issues. DART won't abort or hang because of insufficient CPU power, it will just create poor audio results. The best way to process higher resolution audio data is from disk to DART PRO 24 and back to disk. And then use playback from the disk file to hear the results (there is little or no CPU needed for playback). This would apply to using "On-line" mode as well.
When DART PRO 24 processes high resolution audio in real time directly to or from the sound card the results are likely to be unacceptable. This issue is due to the large amount of digitized audio data and CPU processing power limitations and not DART PRO 24 programming. The restoration algorithms are complicated and require significant CPU power especially DeCrackle.
Our estimates show that doing restoration in real time with 24 bit 96 kHz data requires a CPU way beyond 3 gHz which is the most powerful CPU currently available. A strategy that can be tried for real time processing is to down-sample the audio to 44 or even 22 kHz. Then the CPU power requirements are much less especially from 96 kHz. Hence real time processing is possible. The results should not be any different between 22 kHz and 96 kHz especially on old recordings. In fact we recommend for best results is to do the restoration processing at settings matching the actual original recording which in many cases is 22 kHz and mono. After restoration then the file can up-sampled and made stereo matching the target media and delivery requirements.