Archival equipment

The webmaster has the following equipment at his disposal to digitize, transfer, and capture several different media formats. All recordings are mastered while listening to Audio-Technica ATH-M50S Professional Studio Monitor Headphones. Scans of tape inlays, photographs, info sheets, etc are done using a Canon CanoScan LiDE 60.

Magnetic media

For audio cassette tapes

Nakamichi BX-300

An example of azimuth misalignment. Source: Jack Endino's Cassette Transfer Tips

DM Live offers audio cassette digitization services using a high-end Nakamichi BX-300 to yield the best reproduction quality from any given tape. Nakamichi cassette decks boast a superior frequency response to other decks. Playback azimuth is manually adjusted to match each tape, and pitch control is used when necessary to adjust playback speed to be accurate.

General specifications

• Discrete three head, asymmetrical dual capstan tape transport with pressure pad lifter for optimal playback response capability and stable tape travel.
  • Three tape heads allows for the playback head and recording head to be best optimized for their respective functions, and discrete head mounting allows for more precise alignment compared to a typical “sandwich” head, in which both heads are contained in the same housing with less capability to individually adjust each head.
  • Dual capstan transport ensures consistent tape tension over the heads and allows the pressure pad lifter to function.
    • The pressure pad lifter, unique to dual-capstan Nakamichi decks, eliminates the influence of the cassette’s pressure pad from the tape travel and prevents scrape flutter which negatively affects audio quality. The pressure pad lifter also significantly reduces head wear as less pressure is exerted on the heads.
• Playback head azimuth is manually adjusted to yield the best frequency response from each tape. The diagram to the right depicts why aligning azimuth is important.
• Frequency response of 20 Hz - 20,000 Hz for all three tape types.
• This BX-300 was constructed in the first quarter of 1986, serial number 36160.

Mechanics and calibration

• Belts were replaced with a Marrs Communications factory-quality belt kit in 2018.
  • Performance checked against alignment tapes about every six months.
• Wow & flutter measurements verified to meet factory specifications (less than ±0.048% WTD Peak, and less than 0.027% WTD RMS).
  • Measurement as of November 2019 was approximately 0.0233% RMS.
• Tape transport thoroughly cleaned after each cassette transfer and demagnetized according to owner's manual recommendations, approximately 50 hours between demagnetizations using a wand-type demagnetizer.

Output stage

• Blue Jeans Cable LC-1 Low Capacitance 8-foot RCA cable -> Creative Sound Blaster ZxR sound card (RCA Line In) with 123dB input signal-to-noise ratio (captured at 32-bit depth and 88.2khz sample rate) -> Audacity recording at 32-bit depth 88.2khz sample rate.
  • Each tape is fully wound (fast forwarded) and then rewound to help minimize tape skew by repacking the tape spools. Output level on deck is always at maximum, unless digital clipping occurs, then the volume is reduced as necessary. Line-in input volume is always at maximum on the computer.
  • Furthermore, the tape is fast-forwarded to a point on the tape containing a lot of high-energy treble content (if such treble present on the tape recording to begin with - some tapes are just dreadfully muffled sounding), played back, and playback azimuth is adjusted, then the tape is rewound and playback restarted again to have the optimal playback azimuth set from the beginning.

Final delivery format

• The audio will be encoded as FLAC (level 8 [maximum] compression) using FLAC 1.3.2 64-bit, to 16-bit depth (dithering enabled) and 44.1kHz sample rate using foobar2000 and its Resampler (SoX) component set at best quality. If the audio has significant frequencies above 22kHz, a high-resolution 24/88.2 version may also be provided. The audio is initially captured at the odd 88.2kHz sample rate because it makes more sense to resample exactly in half to the CD-audio 44.1kHz standard as it is a 2:1 ratio, versus resampling from 96kHz which is a 2.177:1 ratio.

For Digital Audio Tape (DAT)

Sony SDT-9000 SCSI DAT drive

• Flashed with firmware that is able to read audio DATs
• Most direct option to rip audio DATs to WAV format in their native sample rate (i.e. 16-bit 32khz / 44.1khz / 48khz)
• Allows error correction which no standalone DAT deck / recorder can perform, to my knowledge; please correct me if I am wrong
• Regularly cleaned according to manufacturer recommendations using "new old stock" Seagate DAT head cleaning tapes
• DATs ripped using dat2wav software on a dedicated Windows XP Service Pack 3 computer (detailed further below)

For video formats

I am currently able to capture the following video media using the following equipment:

• PAL (S)VHS: Philips VR1000 (JVC rebadge) with built-in line time base corrector, S-Video output
• NTSC (S)VHS: JVC HR-S7600U with built-in line time base corrector, S-Video output
• NTSC 8mm Video8 and Hi8: Sony CCD-TRV99 Hi8 camcorder with built-in time base corrector, digital noise reduction, S-Video and stereo RCA output

The video is sent via high-quality S-Video cables through a DataVideo TBC-1000 full-frame time base corrector to stabilize the video signal for capture to help ensure no frames are dropped. Video is captured via an ATI All-In-Wonder 9600XT AGP video card using the lossless Huffyuv AVI codec, captured using VirtualDubMod. Audio is captured at PCM 16-bit 48khz using a Monoprice Premium 6 foot RCA to 3.5mm 22AWG gold plated cable connected to a Creative Sound Blaster X-Fi XtremeMusic sound card.

• Dedicated video capturing computer specifications
  • HP Compaq d530 Convertible Mini Tower
    • Pentium 4 Extreme Edition 3.2ghz with HyperThreading
    • 4GB DDR-400 RAM
    • ATI All-In-Wonder 9600XT AGP video card
    • Creative Sound Blaster X-Fi XtremeMusic sound card
    • 80GB Western Digital Velociraptor WD800HLFS hard drive
    • 500GB Western Digital Caviar Blue WD5000AAKS hard drive
    • Microsoft Windows XP Service Pack 3

Optical Media

Compact Discs / CD-R

• The latest version of Exact Audio Copy configured with optimal settings for a perfect rip
  • Optical drive used does not affect the result of the rip

DVD

• ImgBurn to make ISOs
• PgcDemux or DVD Audio Extractor (if PgcDemux doesn't work) to demux audio soundtracks directly to the original format present on the DVD

BD

• Not applicable at this time due to no Blu-Ray bootlegs existing that need to be ripped; as far as I know, only one or two BD recordings have been torrented on DIME

MiniDisc

Sony MDS-S707 MiniDisc deck

• Optical output is used for digitally bit-perfect captures of non-MDLP MiniDiscs
• Digitally captured using the optical input of Creative Sound Blaster ZxR sound card, recorded using Adobe Audition CC 2015 at 16-bit depth and 44.1khz sample rate using Creative ASIO
• Many thanks to NINLive for their generous contribution of this MiniDisc deck