PortCaster

PODCAST MIXER + RECORDER

4-input Mixer + Streaming Interface with Phone Patch and Mix-minus. Create professional podcasts with guests, or stream from anywhere. Upgrade the sound quality with boutique mic preamps and more!

Podcast Anywhere, With Guests

PortCaster is a mobile audio interface for Podcasting, Live streaming and Videos. With this handheld, portable mixer you can run your own talk show, with music and guests. A unique combination of Mobile Mixer, Recorder, and USB Audio Interface, PortCaster features warm analog precision and a rechargeable battery that lasts 8 hours.

Our updated Jasmine™ mic preamps feature 65dB of low-noise gain and support all professional mics. Featuring analog limiters, mix-minus with a phone patch for remote guests, optional SD recorder, mono blend for streaming, and much more, PortCaster liberates your creative process from the wall, allowing you to work anywhere!

Famous Musicians use our products to record album tracks. Top Voice-over actors use them to record on-air spots and promos. Radio journalists use them to broadcast. Houses of Worship use them to stream services on social media. Podcasters use them to record all over the world. Try PortCaster for yourself today, you won’t be disappointed!

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Available models

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Made in USA
Jasmine™ Mic Preamps
Mix-minus / Remote Guests
High Pass Filter
Dual Optical Limiters
USB blend knob
MONO blend knob
Stereo AUX input
Stereo LINE output
Hi-Fi headphone amp
Portable Interface
Rechargeable battery
Micro SD Recorder
XY Stereo Mics available

popular

Artists / ENdorsers

George Clinton, P-Funk

"What a great little device!"

DonLewis, Synth Pioneer

"MixerFace is the vaccine that fixes audio over the internet!"

Jermaine Bryson, Kool and the Gang

"I love the versatility of this little device. I can use it to practice and to record myself."

Michael Moritz, Broadway Producer

" I LOVE the MixerFace. It solves pretty much every issue I could have on a location shoot."

Matthew Whittaker, PIano Prodigy

"Thank you for making a tactile interface a blind person can use!"

Jake Morelli, Guitarist, QUINCY JONES, ED SHEERAN, BRUNO MARS, THE ROOTS

"Highest quality preamps, in a very slim package, and fairly affordable as well!"

Vaughn Wilson, PRODUCER, George Clinton, P-Funk, Def Jam

"This MixerFace R4 sounds phenomenal!"

Paul Boutin, Grammy® award-winning recording engineer, Kenny “BabyFace” Edmonds

"Everything sounded so much better through the MixerFace!"

Vince Melamed, Keyboardist, Dylan, Eagles, Dan Fogelberg, Bobby Womack, others

"MicPort Pro 2 is a handy "one does all" device!"

Larry Mitchell, Guitarist, Tracy Chapman, Billy Squier, Ric Ocasek

"MixerFace is great for people like myself who livestream to Facebook and Youtube!"

Bluey, Founder, Incognito

"Light and easy to travel with, with electronics that does not compromise on clarity of sound."

Tommy Coster, Producer, Eminem, 50 Cent

"Absolutely amazing! Bravo CEntrance, what a powerful portable audio interface!"

Denny Fongheiser, Percussionist, Bruce Springsteen, Tracy Chapman, Seal

"The great sound and flexibility has made this the primary audio interface in my studio, travel and tour."

Chandler Lawn, Songwriter

"I absolutely love the MixerFace for songwriting!"

CJ Vanston (r), Producer, TOTO, Spinal Tap, Joe Cocker

"A Swiss army knife for audio!"

Mark Egan, Bassist, Pat Metheny, Gil Evans

"I'll be using the MixerFace extensively during my travels for composing, practicing and capturing music of the moment!"

Jordan Rudess, Dream Theater

"Amazing interface with very high-end sound! Makes high quality recordings on the road!"

Charlie Hunter, Guitarist, Bandleader

"This thing is great! Easy for live streaming, greatly improves the sound quality!

Kenneth James Gibson, Producer, Bell Gardens (band), solo artist, Ambient, Americana

"Lovin’ the sound of these Headphones!"

Michael League, Founder, Snarky Puppy

"Why haven't they come up with this sooner?"

Scott Thunes, Bassist, Frank Zappa

"The sound quality is incredible and it's so well-built!"

Marcus Baylor, Drummer, Yellowjackets

"The MixerFace has taken our live streaming to the next level. The mic preamps are great and the MixerFace is a durable device, perfect for traveling on the road!"

Will Lee, Bassist, Fab Faux, David Letterman

"I'm loving the MixerFace for bass! It's quickly becoming my go-to for practicing and recording!"

Sammy Figueroa (r), Percussion, Miles Davis

"MixerFace is so tiny and yet I run my whole radio show from it now!"

Jauqo III X, Bassist, Ornette Coleman, Bernard Purdie, Jamaladeen Tacuma,

"MixerFace symbolizes great recording quality and extreme versatility!"

Peter James, Keyboardist, Synth programmer

"Loving my CEntrance MixerFace R4! So glad someone decided to make a portable, high quality interface with a built in battery for mobile recording!"

Vuyani Wakaba, Bassist

"This thing is RIDICULOUS! It can function as a headphone amp, a mobile recording interface and a stereo mobile recorder!

MAIN FEATURES

Discrete Mic Preamps

Sound quality starts with the Mic preamps. The improved version of our acclaimed Jasmine™ Mic Preamp features a custom, discrete transistor differential input stage. 65 dB of clean, low-noise gain makes it easy to connect any condenser or dynamic microphone, including SM7B, RE20, etc.

Dual Optical Limiters

To help better control recording levels, PortCaster features independent, soft-knee optical limiters for both Host and Guest, for a truly professional sound. Analog photovoltaic limiters are superior to their digital counterparts, as they can subtly catch the audio peaks early, preventing nasty digital clipping.

Dual Optical Limiters

To help better control recording levels, PortCaster features independent, soft-knee optical limiters for both Host and Guest, for a truly professional sound. Analog photovoltaic limiters are superior to their digital counterparts, as they can subtly catch the audio peaks early, preventing nasty digital clipping.

Mix-minus for call-ins

Mix-minus is a feature used by radio stations to add call-in guests to the program. Mix-minus prevents annoying audio feedback from traveling back to the caller through the phone line. With PortCaster you can have call-in guests, too! Mix-minus is included. Just connect your phone, and dial up your guest!

Streaming Mono Blend

Some streaming services don’t offer Stereo sound. No problem! PortCaster’s convenient mono blend knob can combine the input channels, so that Instagram, Facebook Live, Webex, Zoom and other services can hear both participants at once. Even stereo music or sound effects on Aux 3/4 can be mixed down to mono, if needed.

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Streaming Mono Blend

Some streaming services don’t offer Stereo sound. No problem! PortCaster’s convenient mono blend knob can combine the input channels, so that Instagram, Facebook Live, Webex, Zoom and other services can hear both participants at once. Even stereo music or sound effects on Aux 3/4 can be mixed down to mono, if needed.

Ultimate Mobile Recorder

PortCaster likes to be outside. We designed its battery system to offer reliable service in the field. The case is made from lightweight aluminum and the tactile controls make adjustments quick and easy. The optional SD recorder, combined with our custom XY stereo mics turns PortCaster into a professional, high-quality mobile recorder.

Product Details

Your Smartphone is your Studio

Your smartphone is an amazing audio production tool. Many apps let you edit, produce, and then upload your audio online in minutes. But how do you get quality audio into your phone in the first place? Now it’s simple! Set the PortCaster on your coffee table, connect a mic and the phone, start your favorite recording app and you’re recording — it’s that easy! Have a particular vocal mic that suits your voice? No problem. PortCaster offers 48V phantom power to accommodate any dynamic or condenser mic. The custom designed Jasmine™ Mic preamps deliver a world-class signal, designed to capture every nuance of the performance. PortCaster is a professional Mobile Recording Interface. It delivers broadcast-level audio quality and is used worldwide by radio stations, professional musicians, podcasters, life streamers and youtubers.

Improve audio quality on the go

This hand-held recording marvel packs a number of features previously available only in high-end studio interfaces, into an ideal form-factor for traveling audio professionals. PortCaster packs two boutique mic preamps with LED level monitoring, 48V phantom power, Dual Independent Limiters, Mono blend, USB blend, and more, into a handheld device the size of a passport! Our exclusive hybrid power system lets you run the unit off the internal rechargeable battery OR from the wall outlet (R4M, R4D models). By transforming your smartphone into a portable recording studio PortCaster creates an end-to-end mobile recording solution for journalists, podcasters, voiceover artists, and videographers — anyone who records on the go.

Easy and intuitive operation

PortCaster has two Neutrik™ input jacks, which accommodate professional microphones and one TRRS input jack for connecting a cell phone. Now you can easily add remote guests to your podcast. Simply dial them up and PortCaster will do the rest. Its analog Mix-minus circuitry will make sure the guest hears the entire podcast with the exception of their own voice. This prevents annyoing feedback from traveling down the phone line and it’s how big radio stations arrange call-in guests. With PortCaster, you can do this too! PortCaster is also a versatile mixer. It has an Auxiliary stereo input that allows you to effortlessly add background music or sound effects to your podcast. PortCaster can connect to a camera via its stereo line output. The top panel gives you easy access to all of the adjustments, using familiar analog pots. No searching through menu pages to find the right adjustment — quick and easy controls are always at your fingertips.

Recording

Record to: Android, iOS, Mac, Windows, laptops, phones and tablets
Live stream to most social media platforms and conferencing applications
Supported by most smartphone, tablet and computer recording apps
High Dynamic Range Jasmine Mic Pres™ offer plenty of clean gain
Clean, true 48V phantom power for using professional condenser mics
Two Neutrik™ XLR jacks for mic, line or instrument sources
TRRS input for connecting a phone to add a remote guest to your podcast
High Pass Filter to cut the wind noise when recording on location
MONO Blend control to mix your podcast down to MONO for streaming
Stereo Aux input allows you to add background music or sound effects to your podcast
VelvetSound™ A-to-D converters record your audio in studio quality
DSLR-ready line/mic output for a radical improvement in audio quality

Playback

Adjustable Zero Latency Monitor control for dialing in the perfect mix
Custom AmpExtreme™ headphone amp offers clarity, detail and volume
Stereo Line output for flexible monitoring and connecting a DSLR camera
Great headphone amp for hearing your podcast and guests loudly and clearly
Works as a mixer for practicing your performance

Overall

Gets power from any standard, 5V / 2.4A USB charger. No custom power supply needed.
8-hour Rechargeable battery for longer sessions without interruptions (R4M and R4D models)
Internal battery charges from any standard 5V / 2.4A USB charger
Aircraft-grade aluminum chassis for scratch protection and durability
Optional SD card recorder simultaneously records to SD-card and the phone (R4D model)
SD card, phone and outputs are all fed the same stereo mix for redundancy
Optional pair of XY Stereo microphones offers low noise and flat response

Analog Specs


Phantom power	48 V, 10 mA max per channel
Mic Preamplifier Gain	+0 dB…+65 dB
Mic input impedance	1 kOhm
High Pass Filter	130 Hz, 6 dB/octave roll-off
Freq. Response	20 Hz…20 kHz ±0.5 dB
EIN	-127 dB
THD+N	0.004%
Crosstalk, 1kHz	-95 dB
Aux 3/4 max input level	2.2 V rms / +9.2 dBu, rel 0 dB FS
Line-level output	1.8 V rms / +7.1 dBu, rel 0 dB FS
Output Impedance	1 Ohm (headphone output)
Headphone output power	400 mW (total) at 32 Ohm
Supported Headphones	16…600 Ohm
Gain Switch	46 dB pad (set low to feed DSLR)

Digital Specs


Resolution, USB	16-bit, 24-bit
Sample Rate, USB	44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.2 kHz, 192 kHz
Clocking	Two custom, mil-spec clocks, 10 ppm precision, 1 ps jitter
Compatibility	iPhone, iPad, Android, Mac, Linux, PC. Driver is available for Windows
USB jacks	USB-C type
Micro SD Card	Use Class 10 or better, up to 256GB capacity micro SD card with the R4R model
Recorder specs	Independent of the USB output, internal recorder operates at 24-bit/48kHz
Recorded files	Stereo WAV files

General Specs


Mic Preamps	Jasmine™ technology, dual-stage, discrete transistor differential mic preamplifier
Dual Limiters	Dual, independent, photovoltaic limiter/compressors, with soft-knee transfer function
Headphone Amp	AmpExtreme™ technology with bipolar power supply
AC Adapter	Supports standard 5 Volt chargers / adapters with a USB “micro B” cable
DC Charging	+5 V from USB adapter, such as iPad charger. 2 A or more recommended
Analog Supplies	Battery-isolated, triple-filtered ±7 V analog power supply rails
Digital Supplies	Five independent, high-efficiency switch-mode power supplies
Chassis Material	Aircraft-grade aluminum, hard-anodized for scratch resistance, black
Rechargeable Battery	Li-Polymer, 8 hours play/record time (varies with phantom-powered mics)
Unit Dimensions	121 mm (4.76″) (L), 70 mm (2.76″) (W), 36 mm (1.42″) (H)
Unit Weight	R4S: 260 grams (9.1 ounces), R4D: 275 grams (9.7 ounces)
Box Dimensions	161 mm (6.33″) (L), 111 mm (4.37″) (W), 42 mm (1.65″) (H)
Box Weight	455 grams (1 lb)
Included accessories	Quick Start Guide, Velvet carry pouch, Cable for charging or USB audio. Note: Micro SD Card not included.

Specifications subject to change without notice as we continue to improve the product and production process

FAQ

0) What’s the difference between PortCaster and MixerFace?

A: Quite simply, MixerFace is for Music and PortCaster is for Voice. MixerFace has such musician-friendly features, as High Impedance inputs (DI for guitar/bass), Balanced Outputs for connecting Studio monitors, etc. PortCaster on the other hand, offers limiters, Phone patch, Mix-minus, and other broadcast-friendly features.

1) Q: What capacity SD card can be used with PortCaster?

A: We have tested micro SD cards with up to 256GB capacity with no issues.
Tip: Format the card using the PortCaster formatting procedure to ensure most reliable results.

2) Q: How do I speed up file transfer from SD card to the computer?

A: For fastest transfer speeds, insert SD card into your computer and perform a copy operation.

3) Q: Pressing Record button results in flashing orange LED. What is wrong with my SD card?

A: Use R4R formatting procedure to properly format the card for operation with R4R.

4) Q: Can I use a power bank to charge PortCaster? If so, what would be the requirements of this power bank?

A: Yes. You can use any power bank with USB output — size is not important as long as it’s above 5000 mAh. Most power banks are above 10,000 mAh these days.

5) Q: My PortCaster isn’t charging / My PortCaster is not recognized by my USB device

A: Check that you are connecting PortCaster via the correct USB port. There are two USB ports on the device. One for charging (lightning bolt symbol) and one for USB audio connection (the USB symbol).

6) Q: Can you record to a USB device and the built-in SD card recorder in the D model?

A: Yes. PotrCaster R4D offers the ability to record to both places at the same time. They are completely independent for safety and redundancy.

7) Q: Can the sample rate of the built-in SD card recorder be changed?

A: Recordings made to the SD card recorder are fixed at 24bit/48kHz, which is a broadcast standard. Recorder produces Stereo WAV Files.

8) Q: What sample rates does PortCaster support via USB?

A: Cia USB, PortCaster supports the following sampling rates: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz & 192 kHz.

9) Q: What is the SIM tool for?

A: The SIM card extractor tool included with your PortCaster is for accessing the recessed switches on your unit. Use it to turn on 48V phantom power, or activate the high pass filter, as examples. Switches are recessed to avoid accidental adjustment.

10) Q: Does PortCaster have an app?

A: PortCaster doesn’t need an app. It’s simple to use and can be operated entirely from its front panel. Use it with any app you want.
Examples of 3-rd party recording apps include: Audio Evolution (iOS/Android), Auria Pro (iOS), Garageband (iOS), Field Recorder (Android) and Twisted Wave (iOS).

11) Q: Will PortCaster work with Android device?

A: Most Android devices 3 years old or newer should work fine. The phone must support USB audio (not just charging). If your phone has USB C ports, this usually means that the phone is newer and should work. We recommend flagship phone models that support external USB audio devices. The following site has a good list of phones known to support USB audio devices:
http://www.extreamsd.com/index.php/technology/usb-audio-driver (scroll down to “Supported Android devices”)

12) Q: Does PortCaster take power from the connected Android phone?

A: No, PortCaster does not draw any power from the connected phone, which lets the phone’s battery run longer. PortCaster has a separate USB-C jack for connecting power, if needed.

13) Q: May I leave PortCaster permanently plugged in to the charger?

A: Yes. PortCaster may be permanently plugged in to a USB charger, or a computer’s USB port. PortCaster will top off the internal battery every once in a while, but otherwise will consume very little power when turned OFF.

14) Q: With Windows 7 and 10, Playback works, but recording doesn’t work. OR: My app does not work with PortCaster.

A: Recording and Playback sample rates must match. Open Windows Sound Control Panel. In the Advanced settings, set format to 24-bit with your desired sample rate for playback settings and select identical values for recording settings. Here is a tech note that describes this in detail: https://centrance.com/mixerface-with-windows-sample-rate-settings/. It is written for MixerFace, but also applies to PortCaster.

15) Q: To hear myself clearly on playback I have to turn the monitor all the way to the max.

A: Find the knob labelled CH <-> USB in the middle of the channel strip. This is the “blend” control and it lets you adjust the mix between your voice and the sound coming from the computer. Turn that knob counter-clockwise to get more microphone in the headphones. Turn it clockwise to hear more USB return signal. Return signal is useful when you are narrating over background music, listening to a producer cue on a remote broadcast, etc. Also, turn the blend knob to the USB side when you want to hear playback of something you just recorded.

16) Q: Does Skype work with PortCaster?

A: Skype supports external audio interfaces on Mac and Windows and works with PortCaster. However, Skype does not support external audio interfaces under iOS. This is due to US privacy laws around recording telephone conversations. So Skype doesn’t presently work with PortCaster on iOS.

We have verified that Zoom conferencing for iOS does support external audio devices, so PortCaster works well with Zoom online conferencing on iPhone, iPad, etc.

Compatible Apps

We have tested these recording apps successfully with PortCaster and they worked well. However, please note that since these apps come from third party vendors, we cannot provide support for them.

Audio Evolution (iOS/Android)
Auria Pro (iOS)
BandLab (iOS/Android)
BeatMaker 3 (iOS)
Cubasis (iOS)
Field Recorder (Android)
FL Studio Mobile (iOS)
Garage Band (iOS)
Luci Live (iOS/Android)
N-Track (iOS/Android)
Tieline Report-IT (iOS/Android)
Twisted Wave (iOS)

These are just the basics. Many more apps are compatible and are simply not listed here. For example: Streaming apps, Gaming apps, Sampling apps, DJ apps, etc. We simply don’t have the time to test them all (although, boy, would we like to!)

PortCaster

PODCAST MIXER + RECORDER

Podcast Anywhere, With Guests

Available models

DIGITAL

Artists / ENdorsers

George Clinton, P-Funk

DonLewis, Synth Pioneer

Jermaine Bryson, Kool and the Gang

Michael Moritz, Broadway Producer

Matthew Whittaker, PIano Prodigy

Jake Morelli, Guitarist, QUINCY JONES, ED SHEERAN, BRUNO MARS, THE ROOTS

Vaughn Wilson, PRODUCER, George Clinton, P-Funk, Def Jam

Paul Boutin, Grammy® award-winning recording engineer, Kenny “BabyFace” Edmonds

Vince Melamed, Keyboardist, Dylan, Eagles, Dan Fogelberg, Bobby Womack, others

Larry Mitchell, Guitarist, Tracy Chapman, Billy Squier, Ric Ocasek

Bluey, Founder, Incognito

Tommy Coster, Producer, Eminem, 50 Cent

Denny Fongheiser, Percussionist, Bruce Springsteen, Tracy Chapman, Seal

Chandler Lawn, Songwriter

CJ Vanston (r), Producer, TOTO, Spinal Tap, Joe Cocker

Mark Egan, Bassist, Pat Metheny, Gil Evans

Jordan Rudess, Dream Theater

Charlie Hunter, Guitarist, Bandleader

Kenneth James Gibson, Producer, Bell Gardens (band), solo artist, Ambient, Americana

Michael League, Founder, Snarky Puppy

Scott Thunes, Bassist, Frank Zappa

Marcus Baylor, Drummer, Yellowjackets

Will Lee, Bassist, Fab Faux, David Letterman

Sammy Figueroa (r), Percussion, Miles Davis

Jauqo III X, Bassist, Ornette Coleman, Bernard Purdie, Jamaladeen Tacuma,

Peter James, Keyboardist, Synth programmer

Vuyani Wakaba, Bassist

MAIN FEATURES

Discrete Mic Preamps

Dual Optical Limiters

Dual Optical Limiters

Mix-minus for call-ins

Streaming Mono Blend

Streaming Mono Blend

Ultimate Mobile Recorder

Product Details

Your Smartphone is your Studio

Improve audio quality on the go

Easy and intuitive operation

FAQ

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