SERVICES OFFERED >>

OFFERED SERVICES INCLUDE:

TAPE ENHANCEMENT
of poor quality recordings

AUTHENTICATION & ANALYSIS
of questioned recordings

COURTROOM PRESENTATIONS –
Recordings digitized to CD or DVD for instant recall of any selection. Audio & Video Monitors for courtroom

CONSULTATION & INVESTIGATION
of audio and video related matters

REDACTION OF TAPES - TRANSCRIPT REVIEW & CORRECTION
COPYING OF TAPES from any format to any format

ANALYSIS & AUTHENTICITY EXAMINATIONS

Analysis of an audio or video tape includes a number of procedures and tests designed to scientifically discover as much information as possible about how a tape was created. The testing will usually lead to findings on such issues as whether the tape is an original or a copy, presence of stops and re-starts of the tape during the original recording event, and the presence of edits, erasures, over-recordings and other anomalies that may have occurred after the tape was made. If the parties in control of the recording devices at the time the original recording was made have given statements regarding how the recording was made, the examination should be able to determine whether or not those statements are consistent with what actually occurred.


AUDIO TAPE EXAMINATION INCLUDES MICROCSOPIC ANALYSIS


VIDEO TAPE EXAMINATION INCLUDES WAVEFORM ANALYSIS

Required for analysis: A thorough examination requires the purported original recordings, the recording devices used to make the recordings, including any accessory devices such as AC adapters, telephone interconnect devices, transmitters, external microphones, and the like. Analysis is possible without the recording equipment, but the amount of information gained from testing might be limited.


AUDIO ENHANCEMENT

Audio enhancement seeks to make recorded conversations more intelligible by clarifying basic voice quality, reducing unwanted background noises, and raising the volume of distant voices. The process might involve using digital adaptive filters and sophisticated computer audio programs made in the USA and Russia, as well as more traditional analog processing devices such as equalizers and compressors. Any audio source can be enhanced, including standard cassette tapes, micro cassettes, reel to reel tapes, and video tapes containing poorly recorded audio tracks. The resulting “cleaned up” signal is then recorded onto separate audio tapes, compact discs, or video tapes, as required. THE ORIGINAL TAPE IS NOT CHANGED OR HARMED IN ANY WAY.






TRANSCRIPT REVIEW & GENERATION

Even after being enhanced, many recordings are still difficult to fully understand. Our superior digital playback equipment and acoustically-controlled listening environment often enables us to generate more accurate and complete written transcriptions of conversations where court reporters and legal staff have been unable to do so.



SAFETY OF EVIDENCE

When properly performed by a competent laboratory, the testing and/or enhancement does not damage or alter the submitted tapes in any way. Another laboratory or expert will be able to repeat any and all testing procedures. Our lab has never lost or damaged any submitted evidence.

A National Leader in Audio and Video Forensic Technology

James Griffin applies three decades of professional audio and video experience to serve clients in the legal arena. He has analyzed or enhanced thousands of tapes for civil and criminal attorneys prosecutors federal, state, and local law enforcement insurance companies major corporations private investigators and individuals.

click here to download a PDF of James A. Griffin's CV.
Consultant to the CBS Television series CSI: MIAMI on forensic audio and video issues