Bluetooth Loudspeaker – android app for bluetooth speaker

What can you do with a microphone and remote loudspeaker? Who needs this mic and remote loudspeaker? Some examples are:
– sing karaoke at home or anywhere, ***
– boost your voice when teaching in a classroom or lecture room,
– street performance,
– speaker in a conference room,
– connect to PC mic-in with 3.5mm audio cable to work as an mic for karaoke or recording your voice (my require to install software on your PC),
– garage sale, outdoor sale, pop-up store sale, or other sales promotion,
– megaphone for a tour guide at the hot spot,
– outdoor activities,
– a fan of sport team – sing loud to support your favorite sport team in the stadium,
– parties, exhibitions, celebrations and many more cases.
With this app, you have a wireless microphone in your pocket!

*new to major update release version 6.0: this app is now support background mode when using microphone connected to bluetooth speaker. That is, start the mic and transmit your voice to remote speaker, it is now able to exit to the home screen to save battery.

Please read before you download this app:
1. this app does not connect to your bluetooth speaker. User must manually connect the bluetooth speaker through Settings->Bluetooth before using this app.
2. this app MUST CONNECT TO A SPEAKER to play with. DO NOT use the phone internal speaker as it will produce noisy echo voice.

*** User can put this app as background job (click on the Android square button), then run YouTube or any music app. Choose any music and sing karaoke loud! To stop the loudspeaker, go back to this app and click BlueMic or LineOut again.

Remarks:
1. You need to have a bluetooth speaker which can wireless connect to your Android device. The maximum loudness is depends on your output of the speaker. To make it loud with less echo voice, also turn your phone volume to 90% maximum.
2. To reduce voice echo, make sure your mouth do not stay too close to the phone’s microphone. Also, choose the device that come with both noise suppressor and echo canceler.
3. Bluetooth Loudspeaker also support line out to amplified speaker (requires 3.5mm audio cable), or line headphone (please choose 3-pin jack headphone). This app does not support bluetooth headset.
4. When phone rings, phone bluetooth will auto disconnect with the bluetooth speaker. When call ends, user has to manually turn bluetooth on and connect to the speaker again.
5. If your Android device supports bluetooth 5.0, or Samsung dual audio (e.g. Galaxy Note 8, 9, Galaxy S8, S8+, S9, S9+), it is possible to wireless connect 2 bluetooth speakers at the same time.
6. To use wired headset for voice input, recommend to choose high quality 3.5mm wired headset such as Rode or Boya.

What other people say from public websites:

Codrey Electronics: https://www.codrey.com/electronic-circuits/poor-mans-bluetooth-microphone/

…… The “Bluetooth Loudspeaker” (by Wimlog) app is a very simple one that does what the name suggests. Once you have connected your phone to the speakers and the app is running, you are good to go. Just tap on the mic and when it turns blue, start talking.  The slider is for the master volume control but it also helps you to reduce unwanted noise and echo. The app provides a door chime and happy birthday chime as well……

TechUntold: https://www.techuntold.com/live-microphone-apps/

…… At the bottom, you will get the options to broadcast using a Bluetooth or a lineout connection and you can record as well. When you tap the black Mic button, the app will ask permission to connect to the Bluetooth device. Allow them, for confirmation you can see the black color of the mic will change to blue and you are good to go.

Now, you can use your phone to broadcast through a Bluetooth device. Tap the 3.5mm jack button to broadcast using a wired connection. The record does not work until you are broadcasting with either of the connection. Otherwise, it works just fine. There’s a  Playlist menu to access all the recordings that you took using this app……