The Digital One license was awarded 23/6/98; prior to launch, an overnight Classic Dance station, and a daytime Comedy station were dropped, and a standards station added. Most of the channels launched 11/99, though the news channel didn't begin for almost a year. Here's a recap of how each service has changed its bitrate (always measured in kbps) in the years since. Logos are from Psion Wavefinder files from late 2000.
 | Classic FM | 192 to 160 (11/00) |
|---|---|---|
 | Core | 128 to 80 (12/06) to Closed (1/08) |
 | Life | 128 to 96 (12/06) |
 | Oneword | 64 to Closed (1/08) |
 | Planet Rock | 128 |
 | Primetime | 96 to 128 (5/03) to Closed (05/06) |
 | Talk Sport | 64 to 80 (1/00) to 64 (4/03) |
 | Talk Radio | 80 to 64 as Talk Money (1/00) to Bloomberg Radio 8/01 to Closed (12/02) |
 | Virgin 1215 | 192 to 160 (6/01) |
 | --> ITN News --> | (8/00) 48 to Closed (6/02) |
| The Jazz | (12/06) 96 to 128 (1/08) | |
| BFBS | (1/08) 112 |
Various test channels, including D1ten, D1 Temp, D1Test (a recording of birdsong) and Test Silence (a silence presented at 128 kbps in glorious joint-stereo) ran between 12/02 and 6/05. During 2004, Oneword sporadically ran at 56 kbps for a day or two. Core descended to 64 for about four days in early 12/07. Birdsong returned in place of Oneword from 1/08.
Stations were in joint stereo (a mono signal allied to the difference between the left-and-right channels) except as follows:
Classic FM: full stereo (distinct left and right channels) until 6/01
Core, Life: mono since 12/06
Oneword, --> ITN News -->: mono at LSF (lesser sampling frequency) throughout
Talk Sport: mono throughout, at LSF since 4/03
Talk Radio / Talk Money / Bloomberg Radio: mono
Primetime: mono until 5/03
Virgin 1215: full stereo until 6/01
The Jazz: mono until 1/08
Programming on the digital-only channels has been as follows:
Core - jukebox to 2003, increasingly presenter-led to 7/07, jukebox to close.
Life - increasingly presenter-led to 2004, jukebox for a period during 2005, presenters again late 2005-2007, jukebox since.
Oneword - only ever broadcast 6am to midnight. Complex schedule of 50 hours per week to summer 2003, then simplified to eight-hour loop each day; schedule became increasingly complex in the final six months. Highlights from 22/12/07 to close.
Talk Sport - aired 7am to 1am, simulcasting Talk Radio 2pm - 10pm, with repeats filling the rest of the schedule. Took over the AM frequency 17/1/00.
Talk Money - simulcast of Bloomberg Radio UK feed.
Primetime - voicetracked and occasional live programmes to 12/05; repeated three weeks of programming on a loop for the remaining months.
The Jazz - jukebox to 6/4/07, presenter-led since.
Planet Rock - mostly presenter-led throughout.
We must also mention the packet data (encrypted TV, aimed at mobiles) that occupied various amounts of capacity up to 400 kbps from 6/05 into 2008.
