[LAU] Raspberry Pi and real-time, low-latency audio

[Jeremy Jongepier]

> I chose the Modest preset, so it should be just 800MHz and with no
> other modification on other freqs.
>

I'm at 950MHz as my SD cards got corrupted with higher settings. This is 
because higher settings demand a higher core_freq which was the culprit 
in my case, the SD cards I'm using can't cope with higher core_freq 
settings.

> I tried it, but when I try to wipe partitions with gparted or any
> other it unmount itself or say that it's not possible.
>
>> If you run into corruption errors the SD might be
>> defective?
>
> At least not until now, never had a problem. I wonder if the reboot
> cause a physical damage on the SD, but in a reboot it shouldn't happen
> a peak of voltage to cause that.
>

Weird issue, seems like a defective SD card. Bummer but it can happen 
and not just in a RPi.

>>
>>
>>>
>>> This could allow me to maybe boot a system in a USB stick, but then I
>>> waste one USB slot, and I'm afraid that if I buy another SD card it
>>> could be corrupted again and then it would be wasted money.
>>
>>
>> You can boot from an USB stick connected to a hub. I've tested this when
>> trying to run a RT kernel on the RPi. But either my USB stick or the RPi
>> itself has issues with the throughput because I had the idea the RPi was a
>> lot less responsive and audio was completely distorted.
>>
>
> In worst case, I could plug a USB stick on one slot and in the other
> the USB hub with the UA and mouse/keyboard/midi-usb..., but I would
> like to control what happen with SDs cards and when they get
> unusable/broken because of some corruption.

Same here but I think it is just inherent to the design of the RPi, it's 
a very cheap device that allows for quite some hacking and tweaking 
(despite the closed sourcenessness of the SoC). When hacking around you 
can break stuff but I consider that part of the deal.

Jeremy