Tools & Utilities
Mic to Speaker: Microphone
Your iPhone as a live microphone.
Turn your iPhone into a live microphone with real-time audio output to any speaker or headphones. Add voice effects, use it for karaoke, PA announcements, or just amplify your voice. No extra hardware needed.
Download Free on App StoreWhat it does
Everything you need,
nothing you don't.
Live Microphone Output
Real-time audio passthrough from your iPhone mic to any connected speaker or headphones.
Voice Effects
Apply karaoke-style voice effects, pitch shifts, and sound filters on the fly.
Zero Latency Mode
Optimized audio pipeline minimises delay for a natural live sound experience.
Works With Any Speaker
Compatible with Bluetooth speakers, wired headphones, AirPlay, and iPhone speakers.
Simple Interface
One tap to start. No complicated setup or audio engineering knowledge required.
In depth
Everything about
Mic to Speaker: Microphone.
Voice Changer for iPhone
Real-time voice changers on iPhone work by capturing microphone input and applying digital signal processing — pitch shifting, reverb, harmonic alteration, distortion, or robotic effects — through low-latency frameworks like AVAudioEngine and Core Audio, so listeners hear the modified voice with no perceptible delay. One important iOS limitation worth knowing: third-party apps cannot access the native cellular call audio pipeline, meaning true voice changing on phone calls requires routing through a VoIP service with integrated server-side processing. Mic to Speaker takes a different approach, applying effects directly to microphone audio and routing the result to any wired or Bluetooth speaker — no extra hardware required — making it ideal for in-person use cases like live performances, karaoke, games, and presentations where your audience is in the same room.
Use iPhone as Microphone
Your iPhone's built-in microphone is high-quality enough to handle live amplification, voice recording, and real-time audio output — all you need is an app that captures and routes that signal. Mic to Speaker does this directly on the device, piping mic input to any connected speaker with optional voice effects, making it ideal for small rooms, meetings, or impromptu presentations without any computer involved. For routing iPhone audio to a PC or Mac as a virtual input device, that's a different workflow requiring dedicated software like WO Mic or Camo, which create a system-level audio bridge over Wi-Fi or USB.
Sing Karaoke Microphone
Karaoke on your iPhone works by routing your voice through the device's microphone to a connected speaker in real time — either Bluetooth, AirPlay, or wired — layered over whatever backing track is playing. Hardware systems like Magic Sing handle everything onboard with a built-in song catalog and speaker, but they require a dedicated purchase; a software alternative skips that entirely. Mic to Speaker takes the phone-only approach, amplifying your voice through any existing speaker with optional reverb and echo effects, and its karaoke mode is built around low-latency processing so your voice stays in sync rather than arriving a beat behind your performance.
Common questions
Questions answered.
Everything you need to know about Mic to Speaker: Microphone.
How do I use my iPhone as a microphone?
Open Mic to Speaker, tap the microphone button, and your iPhone immediately starts capturing audio and routing it to your connected speaker in real time. Works with Bluetooth speakers, wired headphones, AirPlay devices, and the built-in iPhone speaker — no setup required.
Does Mic to Speaker work with Bluetooth speakers?
Yes. The app works with any Bluetooth speaker paired to your iPhone. Bluetooth introduces 100–300ms of latency depending on the codec and speaker hardware; for most use cases like presentations or PA amplification this is imperceptible, though competitive karaoke performers may prefer a wired connection.
Can I use this app to change my voice in real time?
Yes. Mic to Speaker includes pitch shift controls and voice effect presets that apply to your microphone audio before it reaches the speaker. Effects are processed live using iOS's Core Audio framework, so there is no noticeable delay between speaking and hearing the modified output.
Does it work for karaoke?
Yes. The app includes a karaoke mode designed for low-latency audio output so your amplified voice stays in sync with backing music. Connect to any Bluetooth or wired speaker, play your backing track through another source, and use Mic to Speaker for live vocal amplification with optional reverb or echo effects.
Can I use my iPhone as a microphone for my PC or Mac?
Mic to Speaker outputs audio to a local speaker — it does not route iPhone audio to a computer as a virtual microphone input. For that use case, dedicated apps like WO Mic (Windows) or Camo (Mac) create a system-level audio bridge over Wi-Fi or USB.
Does it work during phone calls?
No. iOS does not allow third-party apps to access the cellular call audio pipeline, so voice effects cannot be applied to outgoing phone calls. Mic to Speaker works for in-person use cases where your audience is in the same room as your speaker.
Is Mic to Speaker free, or does it cost money?
Mic to Speaker is free to download on the App Store. There are no subscriptions or in-app purchases required to use the core microphone and voice effect features.
Does Mic to Speaker work offline without internet?
Yes. All audio processing happens entirely on your iPhone using the on-device Core Audio framework. No internet connection is required.
What iOS version does Mic to Speaker require?
Mic to Speaker requires iOS 16.0 or later. It is optimised for iPhone and runs on all iPhone models that support iOS 16, including iPhone 8 and newer.
How accurate or low-latency is the live audio output?
The app uses iOS's low-latency audio session mode, which targets under 10ms of processing delay on the device itself. Total perceived latency depends on your output method: wired connections are effectively instantaneous, while Bluetooth adds 100–300ms depending on the codec.
Does Mic to Speaker record or store my audio?
No. The app processes audio in real time and routes it directly to your speaker. It does not record, save, or transmit your voice. Audio never leaves your device.
Ready to try Mic to Speaker: Microphone?
Free to download. No subscriptions required.
Download on App Store