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The AVFA exam has 100 questions and runs 2 hours.
These 10 free AVFA questions are organized by exam domain, so you can see how each part of the Audio-Video Forensic Analyst blueprint is tested. Reveal the answer and explanation under each question.
Raw PCM from a recorder configured for 48,000 samples/s is imported at 44,100 samples/s. The sample values are unchanged, and no resampling or time-stretching has occurred. The speech now sounds slower and lower pitched. Which correction addresses both errors?
Correct answer: A - Reimport the unchanged samples at 48,000 samples/s.
A surveillance export contains H.264 video and AAC audio in a MOV container. The review system supports both codecs but accepts MP4 containers only. The original export has been preserved. Which method produces a compatible review copy without another lossy encoding generation?
Correct answer: D - Remux the encoded streams into an MP4 container.
A camera overlay shows a secured door opening at 00:04:30 on August 14, 2026. The camera uses UTC+02:00, and its clock was verified to remain six minutes fast throughout the relevant period. Which timestamp in an independently synchronized UTC access-control log aligns with that opening?
Correct answer: D - August 13, 2026, at 21:58:30 UTC
A clear electrical network frequency trace from a 14-minute recording closely matches a dated reference from the relevant power grid. Competing time alignments fit substantially less well, the strongest alignment agrees with the claimed recording time, and extraction uncertainty has been assessed. What can the examiner infer from this comparison?
Correct answer: B - The extracted trace supports consistency with the claimed recording time.
A gate set to mute levels below -40 dBFS is applied to an interview. Its detector measures fan noise at -48 dBFS, an isolated spoken "not" at -43 dBFS throughout the word, and adjacent speech at -30 dBFS. The gate is closed when "not" begins; above the threshold, it passes the input unchanged. The resulting listening copy will:
Correct answer: C - Mute "not" along with the noise during below-threshold intervals.
A denoised voicemail sounds peppered with short, ringing tones at changing frequencies. The tones are absent from the unprocessed recording, become stronger with heavier spectral subtraction, and do not track speech pitch. What is their most likely source?
Correct answer: A - Musical-noise artifacts introduced by the subtraction process.
A whine drifts from 900 to 1,100 Hz during an interview, and its frequency can be tracked reliably. A narrow fixed notch at 1,000 Hz helps only while the whine crosses that frequency. To suppress the whine while retaining speech frequencies it is not occupying at each moment, the examiner should trial:
Correct answer: A - A narrow notch whose center follows the measured whine.
A white vehicle appears featureless in a surveillance player's display. The source uses 8-bit BT.709 limited-range coding, and direct examination finds spatially varying luma values from 238 to 249 across the vehicle. The player maps every value above 235 to display white. Which intervention offers a sound basis for revealing the retained tonal differences?
Correct answer: B - Remap the source's above-white values into the visible display range.
In a variable-frame-rate recording, a vehicle travels along a straight, surveyed 6.00 m segment. Its front axle crosses the segment's endpoints in frames 100 and 112, whose capture times have been independently validated as 12.400 s and 13.150 s. A file summary also lists a nominal rate of 30 frames/s. What average speed does the validated evidence support over this distance?
Correct answer: C - 8.0 m/s
A security DVR must remain operational for live safety monitoring. An authorized examiner locates relevant footage nearing automatic overwrite. A native export can preserve all relevant cameras, surrounding minutes, and associated metadata before that happens. What is the most proportionate first acquisition step?
Correct answer: C - Export the relevant native files and player, then verify coverage on another computer.
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