Overview
iSM2040 (Home Stage) is a karaoke system that supports USB playback, Bluetooth audio, and AUX (Line‑In). You can also connect it to a TV with HDMI to display lyrics and video.
Key features
- Plays karaoke files from USB (MP4 video and MP3+G)
- Bluetooth audio streaming
- Line‑In (AUX) for audio from another device
- HDMI output to a TV (lyrics/video)
- Microphone inputs for singing
What’s in the box
- Main Karaoke Unit with Base and Extendable Mic Stand
- 2 Wireless Microphones
- AC Adapter
- 4 AA Batteries (for the wireless microphones)
- User Manual
Using the Singing Machine app
Stream karaoke directly to your machine
The Singing Machine app is the recommended way to access thousands of karaoke songs. Pair the app to your machine and stream karaoke videos with on-screen lyrics.
What you get with the app:
- 100,000+ songs — Access a large karaoke catalog with new songs added every Friday
- High-quality videos — Karaoke videos with on-screen lyrics, plus lyrics-only mode
- Ad-free experience — No interruptions while you sing
- Optional lead vocals — Toggle lead vocals on or off
- DJ mode — Queue up to 100 songs and control the playlist from your device
- Easy pairing — Quick wireless connection between your device and karaoke machine
Getting started:
- Download the Singing Machine Karaoke app on your phone or tablet.
- Create an account and register your machine.
- Pair the app to your karaoke machine via Bluetooth.
- Choose a song in the app and start singing.
Subscription options:
Purchase an in-app subscription to unlock unlimited access to the full catalog. Certain plans include a 30-day free trial.
Connecting to a TV (HDMI)
Connecting your machine to a TV lets you see karaoke lyrics and video.
Setup steps
- Connect an HDMI cable from the unit to an HDMI input on your TV.
- On your TV, select the matching HDMI input.
If lyrics do not appear on the TV
- Make sure the HDMI cable is firmly connected on both ends.
- Make sure your TV is set to the correct HDMI input.
- Make sure you are playing a karaoke file format that includes lyrics.
Connecting via Bluetooth
You can use Bluetooth to connect your phone or tablet to the karaoke machine for audio.
Pairing steps
- Turn on the karaoke machine.
- Put the karaoke machine in Bluetooth mode.
- On your phone or tablet, open Settings and select Bluetooth.
- Turn Bluetooth On.
- Select your karaoke machine from the list of available devices.
- If prompted for a PIN, enter 0000.
If Bluetooth connects but there is no music
- Turn up the volume on both the karaoke machine and your phone or tablet.
- Make sure your phone or tablet volume is not muted.
Using Line‑In (AUX)
You can play audio from another device using an AUX (3.5mm) audio cable.
Tips
- Set your device volume to about one-third to avoid distortion, then adjust volume on the unit.
Playing songs from USB
- Insert a USB drive into the karaoke machine.
- Select USB mode.
- Choose a song, then press Play/Enter.
If USB songs will not play
- Replace the file if it is corrupted.
- Make sure the file format is supported.
- Try a different USB drive.
Troubleshooting
No power
- Make sure the unit is charged and turned on.
- If the unit battery is low, connect it to the AC adapter and charge.
- If the unit does not respond, restart it.
No sound (general)
- Turn up the music volume.
- If using an external device (Bluetooth or AUX), make sure the external device volume is turned up.
No sound from the microphone
- Make sure the microphone is turned on (if applicable).
- Turn up the mic volume.
Bluetooth will not pair or connect
- Turn off other nearby Bluetooth devices to avoid accidental pairing.
- Make sure Bluetooth is enabled on your device.
- Restart Bluetooth pairing mode on the unit and try again.
Bluetooth is connected but there is no music
- Make sure your Bluetooth device supports Bluetooth audio (A2DP).
- Turn up the volume on your phone or tablet.
Still having issues because of interference
If the unit is not responding due to strong interference, restart it and try using it in another part of the home.
Missing or broken parts
Your karaoke machine should have included two wireless microphones and an AC power adapter in the box. If any of these items are missing or broken, here is how you can resolve the issue.
Microphones
The original wireless microphones for this model are no longer in stock. However, a compatible wired microphone is available for purchase and will work perfectly with your machine.
AC Adaptor
If the AC adapter was missing from the box, you can use a compatible adapter that you already own or purchase a new one from an electronics retailer.
Important: If you choose to use a different power adapter, it is crucial that it meets the following technical requirements to avoid damaging your machine:
- Output Voltage: 9V DC
- Output Current (Amperage): 1A (or higher, e.g., 1.5A is also safe)
- Polarity: Positive Center
When searching online, a term like "9V 1A DC power adapter positive center" should help find suitable options.
Downloads and resources
Still need help? Contact Singing Machine support: • Get help quickly via our chat bot, click on the chat bubble in the bottom-right of our help page. • Send us an email by submitting a request here or clicking the link at the top-right of our help page.