DRM+ SDR - DRM30 for RTL-SDR

DRM+ SDR turns your Android phone or tablet into a DRM30 (Digital Radio Mondiale) receiver for the AM broadcast bands below 30 MHz: medium wave and shortwave. Connect an SDR dongle with a USB OTG cable and listen to DRM30 broadcasts with their text, images and news services. ■ What you can receive • Audio: HE-AAC, xHE-AAC and Opus • Text messages and service information (station name, codec, bitrate) • Slideshow images • Broadcast Website (MOT) • Journaline news service, with multilingual text, images and Prev/Home/Next navigation • Up to 4 services per station, selectable with one tap ■ Input sources • HF DRM (0.5 – 28.8 MHz): RTL-SDR dongle in direct sampling mode • VHF DRM (30 – 300 MHz): DRM30 signals on VHF, such as test or low-power transmitters • DCP recording files: play back DRM recordings without a receiver • Line-In: DRM30 signal from an external receiver through the audio input ■ Convenient listening • Keeps receiving in the background and with the screen off. A notification is shown while receiving. • Live spectrum display and reception status indicators (FAC / SDC / MSC) • Expandable view for slideshow, website and Journaline pages ■ What you need 1. An Android device with USB OTG support and a USB OTG cable 2. An SDR dongle. Tested with a generic RTL2832U RTL-SDR dongle. For HF reception, use a dongle that supports direct sampling. 3. An Android SDR driver app, installed before you use this app. The driver supports RTL-SDR and HackRF. 4. A suitable antenna for medium wave / shortwave ■ How to start 1. Install the SDR driver app. 2. Connect the SDR dongle to your device with the USB OTG cable. 3. Open DRM+ SDR, choose the input (HF DRM, VHF DRM, DCP file or Line-In) and set the frequency. 4. Press Start. Allow USB access when the driver asks. ■ Notes • This app decodes DRM30 (robustness modes A–D) only. It does not decode DRM+ (Mode E, the VHF band 76–108 MHz broadcast mode), DAB or analog FM. • Reception quality depends on the antenna, the dongle and local signal conditions. ■ Refund policy You can request a refund through Google Play within 48 hours of purchase. Due to company policy, refunds are not possible after 48 hours.

What's new in 1.2.9 • NEW: Automatic frequency alignment. If the tuned frequency is off from the DRM signal, the app finds the signal center and retunes by itself. No more manual fine-tuning. • More stable reception: fixed I/Q samples getting out of step when the input buffer was full. • Auto recovery: if audio stops while the signal is still there, reception restarts automatically and keeps the elapsed time.