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A standard DVD case is a single-piece plastic case with two creases, which folds around and snaps closed. It measures 135 mm × 190 mm × 14 mm (5.31 in × 7.48 in × 0.55 in). It is wrapped on the outside by a thin piece of transparent plastic that can hold a paper label. The label measures 284 mm × 184 mm (11.2 in × 7.2 in).
Outside of a DVD snap case. (This would normally feature artwork and text which has been digitally edited out of this photograph.) The inside of the same snap case, with artwork removed. A snap case is a type of optical disc packaging, used for DVDs and CDs, also known as a paperback case, Ivy Hill Snapper, [1] "snapper case", or FLP case.
A plastic 45 rpm adapter that inserts into the large spindle hole of a 45 rpm record. A 45 rpm adapter (also known as a 45 rpm record insert, 45 rpm spindle adapter, spider, or 7-inch adapter in reference the usual size of a 45 rpm record) is a small plastic or metal insert that goes in the middle of a 45-rpm record so it can be played on the standard size spindle of a turntable.
The drive motor (also called spindle) spins the disc to a scanning velocity of 1.2–1.4 m/s (constant linear velocity) – equivalent to approximately 500 RPM at the inside of the disc, and approximately 200 RPM at the outside edge. (A disc played from beginning to end slows its rotation rate during playback.)
Standard black keep case. A keep case or poly-box is a type of packaging, most commonly used with DVDs and Blu-ray videos (and sometimes CDs).. Besides DVD-Video films, keep cases are very common with most disc-based video games since the PlayStation 2, and they are also found on many PC titles and MP3-CD audiobooks (all use discs that are the same basic dimensions as a DVD).
Devices that feature a spindle also support Mini CDs, as the disc can simply be placed onto the spindle as with a normal CD. Some vertically aligned tray-loading devices, such as the older pre-slimline PlayStation 2 consoles when placed vertically, require an adapter for use with 80 mm CDs.
SVCD was intended as a successor to VCD and an alternative to DVD-Video and falls somewhere between both in terms of technical capability and picture quality. SVCD has two-thirds the resolution of DVD, and over 2.7 times the resolution of VCD. One CD-R disc can hold up to 60 minutes of standard-quality SVCD-format video.
Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...