Kilobit per second to Kibibit per second

Audio codecs compress sound into a stream of bits played back in real time, so the natural unit is bits per second. At 128 kbps, an MP3 encoder allocates 128,000 bits to represent each second of audio. Higher kbps means more data per second, better quality, and larger files.

Technically yes — dial-up ISPs like NetZero still exist in the US, and some rural areas with no broadband rely on them. But at 56 kbps, loading a modern webpage (average 2.5 MB) would take over 5 minutes. It is functionally unusable for anything beyond basic email.

At 128 kbps, the encoder discards more audio detail — cymbals sound washy, stereo imaging narrows, and quiet passages lose nuance. At 320 kbps, most listeners cannot distinguish the MP3 from the original CD in blind tests. The file is 2.5× larger but audibly transparent to most ears.

A standard VoIP call uses 8–64 kbps depending on the codec. The widely used Opus codec delivers excellent voice quality at 16–32 kbps. Traditional landline phone calls used 64 kbps (G.711 codec). HD Voice on modern smartphones uses about 32 kbps with the AMR-WB codec.

The screeching was the modem handshake — two modems negotiating their connection speed by exchanging test tones over the phone line. Each phase of the screech tested different frequencies and protocols. The modems were literally talking to each other in audio, finding the fastest kbps rate the line could support.

Because "kilo" was used to mean both 1,000 and 1,024 depending on context, causing real confusion. RAM manufacturers used 1,024 (binary) while network engineers used 1,000 (decimal). The IEC created kibi (Ki) in 1998 to unambiguously mean 1,024, leaving kilo for exactly 1,000.

Very few people outside of standards bodies and kernel developers. Linux kernel networking code sometimes uses binary units internally, and some IEC-compliant technical documents use Kibps. But consumer networking has fully standardized on decimal kilobits (kbps), making kibibits a niche pedantic distinction.

At the kibi/kilo level, only 2.4%. But the gap compounds — mebi vs mega is 4.86%, gibi vs giga is 7.37%, and tebi vs tera is 9.95%. A "1 TB" hard drive holds only 931 GiB in binary terms, which is why your new drive looks smaller than advertised in Windows.

Hard drives are built from sectors of arbitrary size, so decimal marketing (1 TB = 1,000 GB) is natural and makes drives look bigger. RAM is addressed in powers of 2 because of how binary memory chips work, so binary units (GiB) reflect actual hardware architecture. Neither side wants to change.

Almost certainly not. Networking adopted decimal (×1000) from the beginning because serial link speeds are clock-derived and have nothing to do with powers of 2. Ethernet has always been 10/100/1000 Mbps. Binary prefixes solve a storage problem that networking never had.