What is the length of the average CD?

Disc shapes and diameters

Physical size	Audio capacity	Definition
120 mm	74–80 min	Standard size
80 mm	21–24 min	Mini-CD size
80×54 mm – 80×64 mm	~6 min	“Business card” size

How big is an audio CD?

A standard CD is 120 mm (4.75 inch) in diameter and 1.2 mm (0.05 inch) thick. It is composed of a clear polycarbonate plastic substrate, a reflective metallic layer, and a clear protective coating of acrylic plastic.

What level are CDs recorded at?

The volume of a CD is related to RMS level, which is the average level of recorded audio. Most current pop and rock CDs will be anywhere between -12db and -8db or so. The closer to 0 it is, the louder it will be and more squashed it will sound.

How long is a blank audio CD?

When burning a CD, you can either burn it as a data disc or an audio CD. A data CD can hold up to 700 MB, while an audio CD can hold 80 minutes of sound. If you have 200 MB of MP3 files that add up to three hours of music, you can still only burn 80 minutes to the disc.

How many centimeters is a CD?

80 mm holds up to 24 minutes of music, or 210 MB (210 × 220 bytes) of data. The original CD single (sometimes mini CD single or 3-inch CD or CD3 in the US) is a music single released on a mini Compact Disc that measures 8 cm (3.1 in) in diameter, rather than the standard 12 cm (4.7 in).

How many MB is a CD?

700 MB
A standard 120 mm, 700 MB CD-ROM can actually hold about 703 MB of data with error correction (or 847 MB total). In comparison, a single-layer DVD-ROM can hold 4.7 GB (4.7 × 109) of error-protected data, more than 6 CD-ROMs.

What RMS for mastering?

With a loud track that has the purpose of carrying a bold and intense sound, they should have an RMS level of roughly -7dBFS to -12dBFS. Tracks that don’t have that much dynamic energy or quieter parts, would be better suited with an RMS level of -16dBFS to -18 dBFS.

What size is a CD in inches?

Dimensions of CD Covers The standard CD cover is four inches wide by one inch high. A 75 by 4 matrix. 12 x 12 centimeters, or 75 inches x 75 inches.

What is the thickness of a CD?

A CD is 1.2 mm thick and rotates at a speed that varies between around 500 r.p.m. at the inside of the disc to around 200 r.p.m. at the outside (the disc is read from the inside to the outside).

What’s an audio CD?

Audio compact discs are specially formatted with tracks for listening to music, lectures, book readings, etc. An example is a CD of your favorite band that you bought at a music store. Because this type is a universal format, it can usually be played on most CD players.

How are CDs read?

The CD drive shines a laser at the surface of the CD and can detect the reflective areas and the bumps by the amount of laser light they reflect. The drive converts the reflections into 1s and 0s to read digital data from the disc.