DRM broadcasting can be done using a choice of different bandwidths

DRM30 system uses SW and MW frequency bands and is based on signal bandwidths of 9 kHz or 10 kHz. It also consists of modes which utilize wider bandwidths of 18 kHz or 20 kHz as well as modes requirin g 4.5 kHz or 5 kHz of bandwidth. DRM+ require a narrow bandwidth and is intended to suit FM broadcast band plan with 100 kHz of inter channel frequency gap. DRM allows broadcasting of single or small numbers of audio services together with bit rates ranging from 37 kbps to 186 kbps, allowing four services simultaneously. This allows DRM to operate parallel to analog transmission.

    DRM broadcasting can be done using a choice of different bandwidths:

• 4.5 kHz. Gives the ability for the broadcaster to do a simulcast and use the lower-sideband area of a 9 kHz raster channel for AM, with a 4.5 kHz DRM signal occupying the area traditionally taken by the upper-sideband.^[12] However the resulting bit rate and audio quality is not good.
• 5 kHz. Gives the ability for the broadcaster to do a simulcast and use the lower-sideband area of a 10 kHz raster channel for AM, with a 5 kHz DRM signal occupying the area traditionally taken by the upper-sideband. However the resulting bit rate and audio quality is marginal (7.1–16.7 kbit/s for 5 kHz). This technique could be used on the shortwave bands throughout the world.
• 9 kHz. Occupies half the standard bandwidth of a region 1 long wave or medium wave broadcast channel.
• 10 kHz. Occupies half the standard bandwidth of a region 2 broadcast channel. could be used to simulcast with analogue audio channel restricted to NRSC5. Occupies a full worldwide short wave broadcast channel (giving 14.8–34.8 kbit/s)
• 18 kHz. Occupies full bandwidth of region 1 long wave or medium wave channels according to the existing frequency plan. This offers better audio quality.
• 20 kHz. Occupies full bandwidth of region 2 or region 3 AM channel according to the existing frequency plan. This offers highest audio quality of the DRM30 standard (giving 30.6–72 kbit/s).
• 100 kHz for DRM+. This bandwidth can be used in band I, II, and III and DRM+ can transmit four different programs in this bandwidth or even one low definition digital video channel.