Sources:

1) CD 'The Hour Glass' (EMI Records USA 0777-7-96059-2-7, 1992):
Out Of The Night - recorded on 8/12/67
Nothing But Tears - recorded on 8/10/67
Love Makes The World Go 'Round - recorded on 8/12/67
Cast Off All My Fears - recorded on 8/15/67
I've Been Trying (Version #2) - recorded on 8/12/67
No Easy Way Down - recorded on 8/10/67
Heartbeat - recorded on 8/15/67
So Much Love - recorded on 8/10/67
Got To Get Away - recorded on 8/11/67
Silently - recorded on 8/10/67
Bells - recorded on 8/10/67

Produced and arranged by Dallas Smith
Engineers: Armin Steiner and Eirik Wangberg

[Armin Steiner was the owner and sound engineer of 'Sound Recorders Studios' at 6226 Yucca Street in Los Angeles, CA from 1965 until 1971.
Eirik Wangberg was trained in sound engineering by Armin Steiner from 1967 until 1971.]

2)
Anathalee G. Sandlin: 'A Never-Ending Groove - Johnny Sandlin's Musical Odyssey', page 39 (Mercer University Press, 2012):
. . . . . Armin Steiner was the engineer and saving grace of the sessions. He made us sound good. If it hadn't been for him, recording would have been much harder. The Studio was Sound Recorders, and it had a great West Coast drum sound. . . . .

3)
Anathalee G. Sandlin: 'A Never-Ending Groove - Johnny Sandlin's Musical Odyssey', page 50 (Mercer University Press, 2012):
. . . . . The first album was done at Sound Recorders with Armin Steiner as the engineer in charge of the sessions, and that record sounded better than second album. . . . .

4) Galadrielle Allman: 'Please Be With Me: A Song For My Father, Duane Allman', page 97 (Spiegel & Grau, 2014):
. . . . . Working in the studio on their first album was what they all had looked forward to most, but it was an alien experience. Sound Recorders Studios was nice enough, but they were paired with producer Dallas Smith, who had his own ideas about the direction they should take. . . . .

5) 4CD box set 'Dreams' (Polydor 839-417-2, 1989):
Cast Off All My Fears - Recorded at Liberty Sound Studios, Los Angeles, California, August 1967

6) 7CD box set 'Skydog: The Duane Allman Retrospective' (Rounder Records 11661-9137-2, 2013):
Cast Off All My Fears
I've Been Trying
Nothing But Tears
Produced by Dallas Smith
Recorded August 1967 at Liberty Sound Studios, Los Angeles, CA.
 


This is a picture of the tape box, containing a protection copy of the master tape.
It shows that the recordings were made at 'Sound Recorders Studio', 6226 Yucca Street, Hollywood, CA and were mixed by EW [Eirik Wangberg] and AS [Armin Steiner].
And it also shows that the master tape was made on September 13, 1967 at the Liberty studio.
 
This is a picture of the tape box, containing a new mono master tape.
It shows that it was re-equalized on October 9, 1967 by Liberty Records.
(Thanks to Bill Levenson for the pictures)