SpectrumView Plus

I have used this software for years on my phone and the insights it has given to me have been phenomenal. I have used it to look at the sounds of musical instruments and the changing tonality of teacup-chings dependening where the tea cup is tapped. The basic functionality is excellent, but I have struggled to try to download the data as a .csv file. The web link given does not work and I have no idea how the alleged "iTunes file sharing" works. Given how good the. rest of teh application is this is really disappoint - hence not 5 stars.

I have this app on both iPhone 6+ and iPad. I use it all the time when teaching audio fundamentals. Wouldn't want to be without it. Well done OWR, another great product.

I use this package with an external mic input to monitor my light beam transmissions with slow morse code on an audio subcarrier. The ability to look in narrow bandwidths and to take screenshots and recordings from within the app is great when away from home and much more convenient than using a laptop. This really is a quality audio spectrum analyser and spectrum scope in the palm of your hand. It is also useful with my VLF radio experiments where I feed weak VLF signals for display and analysis. Brilliant.

It saves every setting I put in place through even restarts but it turns the grid lines on SPECIFICALLY, and CONSTANTLY, to a point where I’m wondering if it’s my phone glitching or the app, cause it’s not me, I would have accidentally pressed any other button in settings by now, but it’s just always the grid lines and I always find myself turning them off- BUT, that’s my only issue with the app, so if you like grid lines this may be a five star review for you.

Worthless. Settings keep resetting on their own —set sample rate and maximum frequency and they reset when I uploaded a couple tracks I wanted to analyze. Go change it again and play the track and guess what, reset! After doing this a countless number of times I gave up! Not too mention I have settings set to display spectrogram when using playback or record but no it just stays in playback! Also when I do switch to spectrogram view while playing a track I can’t pause or pan! I want my money back!!! I can’t deal with worthless waste of time!

The app crashes when I try to play an iTunes song.

This is my favorite frequency analysis app. Incredibly useful and insightful. You can plug your music in or use the mic. A total pleasure to use on drugs. Sometimes it clips when I run my own tracks on it though that’s pretty minor.

The original, free SpectrumView was an eye-opener about the way a device like the iPhone could change the landscape of tools: quite unexpectedly, and without spending a cent, I suddenly had in my hand a fair equivalent of a kilo-buck spectrum analyzer; a tool I’d needed from time-to-time over the years, but “knew” I’d never own, or even have access to. It’s been great that the author(s) have continued to support the tool over the years, and, at some stage, even began extending it. I’m glad to have a number of those extensions, and, in this “Plus” version, to obtain them without the hassle of in-app purchases. Also, after so many years, I’m happy to put some money in the author’s pocket for all that work. (As to the reviewer who stated that the app has an 8 kHz frequency limit: go to settings and pick an audio sampling rate twice that of the maximum frequency of interest; even my iPhone 5s has no problem reaching 24 kHz. Whether the iPhone microphone is responsive to such frequencies, and equally responsive across whatever frequency range it does handle, is another matter, but that’s what external mics are for.)

Seriously

The free version is very cool. Pretty amazing for a free app. The plus version, not so much. In the time-domain view, you can't zoom in or out in the time domain (left/right); only up/down (frequency). Also, in both versions, the time scale (x axis) has horrible increments and tick marks. Like, 2.8 seconds, 5.7 seconds, 8.5 seconds (!!!). It's almost impossible to read the duration of any event, especially since you can't move the waveform left/right. Another enhancement I'd like to see would be the ability to put a marker on multiple peaks in the spectrum analyzer and maybe even a peak finder. In the time domain, the ability to put multiple markers and record the time between markets/events would be great.