Hi all,
There is a lot of talk about using smartphones with suitable apps and microphones to capture audio and then combining it with video in post-processing. There are a number of blogs and also demos on youtube[1] The value proposition is that you can attach a $50 lavalier to the smartphone and get the same quality audio as you would get from a $500+ Sennheiser kit. Typical criteria for the app: - disables ringer while recording or refuses to record unless phone in silent mode or airplane mode - disables AGC in Android - choice of sample rate - choice of file format/compression scheme Ideal criteria: - free software - available in f-droid - as well as recording to SD card, can send an RTP stream that can be received by VLC on other devices - millisecond timestamps or some kind of remote control or start/stop co-ordination with video, possibly using an app like qDslrDashboard - reporting battery and wifi stats over the network to the audio desk (copy code from Lumicall[3]) Does anybody feel that this option is stable enough to be useful in a (mini)DebConf environment or other free software event, maybe not for the main talks but even if it is just for things like interviews, dev rooms, etc? Personally, I've observed that I can get hours of usage out of my Samsung Note 3 using Lumicall, which is streaming VoIP in both directions and encrypting. This suggests that a device with a suitably charged battery can offer some value. Can anybody comment on some issues: - do any phones offer sufficient pre-amp and ADC circuitry or is it better to use a small USB sound device with an OTG connector into the phone to get optimum audio? - has anybody seen any free software app that can disable AGC? There are several in f-droid, I checked some already and they don't have this option. There is a free of charge closed-source app with this feature[2] - has anybody looked into millisecond time sync for devices in this category (Android and DSLR)? Looking at an app like qDslrDashboard, I imagine it could be used to start audio recording in the phone or send a multicast announcement at the same instant that it sends a start instruction to the camera. Regards, Daniel 1. https://www.youtube.com/watch?v=6mXAIUhG9HY 2. https://play.google.com/store/apps/details?id=dje073.android.audiorecorderlite&hl=en 3. https://github.com/opentelecoms-org/lumicall/tree/master/src/org/lumicall/android/ganglia _______________________________________________ Debconf-video mailing list [email protected] http://lists.debconf.org/mailman/listinfo/debconf-video
